<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  
  <meta name="renderer" content="webkit">
  <meta http-equiv="X-UA-Compatible" content="IE=edge" >
  <link rel="dns-prefetch" href="http://yoursite.com">
  <title>Serebii的博客</title>
  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
  <meta name="description" content="Serebii&apos;s blog 王锡阳的博客">
<meta property="og:type" content="website">
<meta property="og:title" content="Serebii的博客">
<meta property="og:url" content="http://yoursite.com/index.html">
<meta property="og:site_name" content="Serebii的博客">
<meta property="og:description" content="Serebii&apos;s blog 王锡阳的博客">
<meta property="og:locale" content="default">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="Serebii的博客">
<meta name="twitter:description" content="Serebii&apos;s blog 王锡阳的博客">
  
    <link rel="alternative" href="/atom.xml" title="Serebii的博客" type="application/atom+xml">
  
  
    <link rel="icon" href="/images/avatar.jpeg">
  
  <link rel="stylesheet" type="text/css" href="/./main.0cf68a.css">
  <style type="text/css">
  
    #container.show {
      background: linear-gradient(200deg,#4fb3a4,#f5b977);
    }
  </style>
  

  

</head>

<body>
  <div id="container" q-class="show:isCtnShow">
    <canvas id="anm-canvas" class="anm-canvas"></canvas>
    <div class="left-col" q-class="show:isShow">
      
<div class="overlay" style="background: #4d4d4d"></div>
<div class="intrude-less">
	<header id="header" class="inner">
		<a href="/" class="profilepic">
			<img src="/images/avatar.jpeg" class="js-avatar">
		</a>
		<hgroup>
		  <h1 class="header-author"><a href="/">Serebii</a></h1>
		</hgroup>
		
		<p class="header-subtitle">既然你与众不同，又何必害怕孤独。</p>
		

		<nav class="header-menu">
			<ul>
			
				<li><a href="/">主页</a></li>
	        
				<li><a href="/tags/随笔/">随笔</a></li>
	        
			</ul>
		</nav>
		<nav class="header-smart-menu">
    		
    			
    			<a q-on="click: openSlider(e, 'innerArchive')" href="javascript:void(0)">所有文章</a>
    			
            
    			
    			<a q-on="click: openSlider(e, 'friends')" href="javascript:void(0)">友链</a>
    			
            
    			
    			<a q-on="click: openSlider(e, 'aboutme')" href="javascript:void(0)">关于我</a>
    			
            
		</nav>
		<nav class="header-nav">
			<div class="social">
				
					<a class="github" target="_blank" href="https://github.com/Serebiisme" title="github"><i class="icon-github"></i></a>
		        
					<a class="weibo" target="_blank" href="https://weibo.com/u/1968082587?refer_flag=1001030101_" title="weibo"><i class="icon-weibo"></i></a>
		        
					<a class="mail" target="_blank" href="mailto:422574650@qq.com" title="mail"><i class="icon-mail"></i></a>
		        
			</div>
		</nav>
	</header>		
</div>

    </div>
    <div class="mid-col" q-class="show:isShow,hide:isShow|isFalse">
      
<nav id="mobile-nav">
  	<div class="overlay js-overlay" style="background: #4d4d4d"></div>
	<div class="btnctn js-mobile-btnctn">
  		<div class="slider-trigger list" q-on="click: openSlider(e)"><i class="icon icon-sort"></i></div>
	</div>
	<div class="intrude-less">
		<header id="header" class="inner">
			<div class="profilepic">
				<img src="/images/avatar.jpeg" class="js-avatar">
			</div>
			<hgroup>
			  <h1 class="header-author js-header-author">Serebii</h1>
			</hgroup>
			
			<p class="header-subtitle"><i class="icon icon-quo-left"></i>既然你与众不同，又何必害怕孤独。<i class="icon icon-quo-right"></i></p>
			
			
			
				
			
				
			
			
			
			<nav class="header-nav">
				<div class="social">
					
						<a class="github" target="_blank" href="https://github.com/Serebiisme" title="github"><i class="icon-github"></i></a>
			        
						<a class="weibo" target="_blank" href="https://weibo.com/u/1968082587?refer_flag=1001030101_" title="weibo"><i class="icon-weibo"></i></a>
			        
						<a class="mail" target="_blank" href="mailto:422574650@qq.com" title="mail"><i class="icon-mail"></i></a>
			        
				</div>
			</nav>

			<nav class="header-menu js-header-menu">
				<ul style="width: 50%">
				
				
					<li style="width: 50%"><a href="/">主页</a></li>
		        
					<li style="width: 50%"><a href="/tags/随笔/">随笔</a></li>
		        
				</ul>
			</nav>
		</header>				
	</div>
	<div class="mobile-mask" style="display:none" q-show="isShow"></div>
</nav>

      <div id="wrapper" class="body-wrap">
        <div class="menu-l">
          <div class="canvas-wrap">
            <canvas data-colors="#eaeaea" data-sectionHeight="100" data-contentId="js-content" id="myCanvas1" class="anm-canvas"></canvas>
          </div>
          <div id="js-content" class="content-ll">
            
  
    <article id="post-JavaScript-闭包那些事儿" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/26/JavaScript-闭包那些事儿/">JavaScript 闭包那些事儿</a>
    </h1>
  

        
        <a href="/2019/05/26/JavaScript-闭包那些事儿/" class="archive-article-date">
  	<time datetime="2019-05-26T04:54:38.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-26</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <h3 id="闭包-closure"><a href="#闭包-closure" class="headerlink" title="闭包(closure)"></a>闭包(closure)</h3><hr>
<p>前言：记录一下对于<code>闭包</code>的概念及相关认知</p>
<p>在说闭包之前，得先说一下和闭包相关的两个概念 —— 变量<code>作用域</code> and <code>声明周期</code></p>
<h4 id="变量的作用域"><a href="#变量的作用域" class="headerlink" title="变量的作用域"></a>变量的作用域</h4><p><code>概念</code>：变量的作用域，是指<u>变量的有效范围</u>，即哪些地方可以访问到</p>
<p><code>要点</code>: </p>
<ul>
<li><p>变量的作用域可分为 <strong>全局作用域</strong> 、 <strong>函数作用域</strong>、<strong>块级作用域</strong> </p>
<ul>
<li><p>全局作用域：变量在全局范围内都有效，且运行期间不会被销毁，任何地方都能被访问到</p>
</li>
<li><p>函数作用域：变量声明在函数体内，在函数体外不能直接被访问</p>
</li>
<li><p>块级作用域：由语句块「一对大括号」形成的作用域，其中的let、const变量，不能在语句块外被访问</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">&#123;</span><br><span class="line">	<span class="keyword">var</span> a = <span class="number">1</span>;</span><br><span class="line">	<span class="keyword">const</span> b = <span class="number">2</span>;</span><br><span class="line">	<span class="keyword">let</span> c = <span class="number">3</span>;</span><br><span class="line">&#125;</span><br><span class="line">a; <span class="comment">// 1;</span></span><br><span class="line">b; <span class="comment">// 报错</span></span><br><span class="line">c; <span class="comment">// 报错</span></span><br></pre></td></tr></table></figure>
</li>
</ul>
</li>
<li><p>在JavaScript中，<strong>函数</strong>和<strong>语句块</strong>可以创建作用域</p>
</li>
<li>在函数中声明一个变量的时候，如果变量没有带上关键字<strong>var</strong>那么变量会变成<strong>全局变量</strong></li>
</ul>
<h4 id="变量的生命周期"><a href="#变量的生命周期" class="headerlink" title="变量的生命周期"></a>变量的生命周期</h4><p><code>概念</code>：变量的声明周期是指变量存在且可以被访问到的时间区间，即何时产生何时消失。</p>
<p><code>要点</code>：</p>
<ul>
<li><p>全局变量的生命周期是永久的</p>
</li>
<li><p>局部变量的生命周期根据其是否被引用决定是否被销毁回收，一般而言声明在函数体内的局部变量，当函数退出时，其引用即被消除，变会被销毁回收。</p>
</li>
</ul>
<hr>
<p>接下来看一段代码：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">add</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">  <span class="keyword">var</span> i = <span class="number">0</span>;</span><br><span class="line">  <span class="keyword">return</span> <span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">  	alert(i++);</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"><span class="keyword">var</span> f = add();</span><br><span class="line">f(); <span class="comment">// 0</span></span><br><span class="line">f(); <span class="comment">// 1</span></span><br></pre></td></tr></table></figure>
<p>此时，函数退出时，局部变量 i 并没有被销毁，而是一直在某个地方存着。</p>
<p>这是因为当调用add()时，返回了一个函数引用给变量 f , 而变量 f 需要引用到 变量 i , 因此 i 就不被销毁，闭包就由此产生了。</p>
<img src="/2019/05/26/JavaScript-闭包那些事儿/1.png">
<hr>
<h4 id="闭包的概念"><a href="#闭包的概念" class="headerlink" title="闭包的概念"></a>闭包的概念</h4><p><code>概念</code>：</p>
<ul>
<li>闭包是一个绑定了执行环境的函数，它与普通函数的区别在于它携带了执行环境；</li>
<li>闭包是由函数和与其相关的引用环境的组合而成；</li>
<li>闭包允许函数访问其引用环境的中的变量；</li>
</ul>
<p><code>闭包的古典定义</code>：</p>
<ul>
<li><p>环境部分</p>
<ul>
<li>环境</li>
<li>标识符列表</li>
</ul>
</li>
<li><p>表达式部分</p>
</li>
</ul>
<p><code>JavaScript对应的闭包组成部分</code>：</p>
<ul>
<li><p>环境部分</p>
<ul>
<li>环境：函数的词法环境 (执行上下文的一部分)</li>
<li>标识符列表：函数中用到的未声明的变量</li>
</ul>
</li>
<li><p>表达式部分：函数体</p>
</li>
</ul>
<blockquote>
<p>补充说明：</p>
<p>执行上下文氛围三个部分：</p>
<ul>
<li>词法环境：当获取变量时使用</li>
<li>变量环境：当声明变量时使用</li>
<li>this值</li>
</ul>
</blockquote>
<hr>
<h4 id="闭包的作用"><a href="#闭包的作用" class="headerlink" title="闭包的作用"></a>闭包的作用</h4><ul>
<li><p>保存现场</p>
<p>先上一段经典的代码</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i &lt; <span class="number">5</span>; i ++) &#123;</span><br><span class="line">	setTimeout(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">		<span class="built_in">console</span>.log(i)</span><br><span class="line">	&#125;,<span class="number">1000</span>)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>我们预期想要在1秒之后看到一次输出0，1，2，3，4；然而看到的确实输出5个5，不尽人意…</p>
<blockquote>
<p>原因：那是因为 settimeout中的function被添加到宏任务队里，在for循环之后执行，function内指向的变量 i，在输出时，for循环已经执行完毕了，此时 i = 5 ；因此看到输出 5 个 5。</p>
</blockquote>
<blockquote>
<p>解决方法：可以利用闭包环境把 i 先保存起来，当函数顺着作用域链寻找 i 值时，会先找到闭包环境中的i</p>
</blockquote>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i &lt; <span class="number">5</span>; i ++) &#123;</span><br><span class="line">	setTimeout((<span class="function"><span class="keyword">function</span>(<span class="params">i</span>)</span>&#123;</span><br><span class="line">		<span class="keyword">return</span> <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">			<span class="built_in">console</span>.log(i);</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;)(i),<span class="number">1000</span>)</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">VM463:<span class="number">4</span> <span class="number">0</span></span><br><span class="line">VM463:<span class="number">4</span> <span class="number">1</span></span><br><span class="line">VM463:<span class="number">4</span> <span class="number">2</span></span><br><span class="line">VM463:<span class="number">4</span> <span class="number">3</span></span><br><span class="line">VM463:<span class="number">4</span> <span class="number">4</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>封装变量</p>
<p>JavaScript是没有private 关键字的，因为我们没有办法声明对象的私有变量，但是我们可以利用 闭包把变量封装起来，变成’私有变量’ </p>
<p>或者说，我们可以把一些不需要暴露在全局环境的变量封装成私有变量。</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> person = (<span class="function"><span class="keyword">function</span>(<span class="params">pName</span>)</span>&#123;</span><br><span class="line">	<span class="keyword">var</span> name = pName;</span><br><span class="line">	<span class="keyword">return</span> &#123;</span><br><span class="line">    getName() &#123;</span><br><span class="line">      <span class="keyword">return</span> name;</span><br><span class="line">    &#125;,</span><br><span class="line">    setName(nName) &#123;</span><br><span class="line">      <span class="keyword">return</span> name = nName</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;)(<span class="string">'serebii'</span>)</span><br><span class="line"></span><br><span class="line">person.getName(); <span class="comment">// "serebii"</span></span><br><span class="line">person.setName(<span class="string">'karina'</span>); <span class="comment">// "karina"</span></span><br><span class="line">person.name;			<span class="comment">// undefined</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>延长局部变量寿命</p>
<p>来一个例子吧，ing对象经常用于数据上报</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> report = <span class="function"><span class="keyword">function</span>(<span class="params">src</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> img = <span class="keyword">new</span> Image();</span><br><span class="line">  img.src = src;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p><code>问题</code>：数据上报会造成数据丢失。</p>
<p><code>原因</code>：img是report函数中的局部变量，调用结束就被销毁，此时HTTP请求是否发出还未知。</p>
<p><code>解决方案</code>：利用闭包将img缓存起来</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> report = (<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">  <span class="keyword">var</span> imgs = [];</span><br><span class="line">  <span class="keyword">return</span> <span class="function"><span class="keyword">function</span>(<span class="params">src</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">var</span> img = <span class="keyword">new</span> Image();</span><br><span class="line">    imgs.push(img);åß</span><br><span class="line">  	img.src = src;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;)()</span><br></pre></td></tr></table></figure>
</li>
<li><p>性能优化</p>
<p>1、减少函数定义时间和内存消耗</p>
<p>使用前</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">sum</span>(<span class="params">i, j</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">var</span> add = <span class="function"><span class="keyword">function</span>(<span class="params">i, j</span>)</span>&#123;</span><br><span class="line">    <span class="keyword">return</span> i+j;</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">return</span> add(i, j)</span><br><span class="line">&#125;</span><br><span class="line"><span class="built_in">console</span>.time();</span><br><span class="line"><span class="keyword">for</span>(<span class="keyword">var</span> i = <span class="number">0</span>; i&lt; <span class="number">1000000</span>; i++) &#123;</span><br><span class="line">  sum(<span class="number">1</span>,<span class="number">1</span>);</span><br><span class="line">&#125;</span><br><span class="line"><span class="built_in">console</span>.timeEnd()</span><br><span class="line">VM637:<span class="number">12</span> <span class="keyword">default</span>: <span class="number">6.9619140625</span>ms</span><br></pre></td></tr></table></figure>
<p>使用后</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> sum = (<span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">	<span class="keyword">var</span> add = <span class="function"><span class="keyword">function</span>(<span class="params">i,j</span>) </span>&#123; <span class="keyword">return</span> i + j &#125;;</span><br><span class="line">	<span class="keyword">return</span> add;</span><br><span class="line">&#125;)</span><br><span class="line"><span class="built_in">console</span>.time();</span><br><span class="line"><span class="keyword">for</span>(<span class="keyword">var</span> i = <span class="number">0</span>; i&lt; <span class="number">1000000</span>; i++) &#123;</span><br><span class="line">  sum(<span class="number">1</span>,<span class="number">1</span>);</span><br><span class="line">&#125;</span><br><span class="line"><span class="built_in">console</span>.timeEnd()</span><br><span class="line">VM1325:<span class="number">10</span> <span class="keyword">default</span>: <span class="number">5.71484375</span>ms</span><br></pre></td></tr></table></figure>
<p>2、普通递归函数跟使用闭包记录调用返回结果的递归函数调用次数对比</p>
<p>普通递归函数</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> factorial = (<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">  <span class="keyword">var</span> count = <span class="number">0</span>;</span><br><span class="line">  <span class="keyword">var</span> fac = <span class="function"><span class="keyword">function</span>(<span class="params">i</span>)</span>&#123;</span><br><span class="line">    count++;</span><br><span class="line">    <span class="keyword">if</span> (i==<span class="number">0</span>) &#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">'调用次数：'</span> + count); </span><br><span class="line">      <span class="keyword">return</span> <span class="number">1</span>;</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="keyword">return</span> i*factorial(i<span class="number">-1</span>);</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">return</span> fac;</span><br><span class="line">&#125;)();</span><br><span class="line"><span class="keyword">for</span>(<span class="keyword">var</span> i=<span class="number">0</span>;i&lt;=<span class="number">10</span>;i++)&#123;</span><br><span class="line">  <span class="built_in">console</span>.log(factorial(i)); </span><br><span class="line">&#125;</span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">1</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">1</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">3</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">1</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">6</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">2</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">10</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">6</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">15</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">24</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">21</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">120</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">28</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">720</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">36</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">5040</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">45</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">40320</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">55</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">362880</span></span><br><span class="line">VM1348:<span class="number">6</span> 调用次数：<span class="number">66</span></span><br><span class="line">VM1348:<span class="number">14</span> <span class="number">3628800</span></span><br></pre></td></tr></table></figure>
<p>使用闭包记录调用返回结果的递归函数 – 记忆函数</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> factorial = (<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">  <span class="keyword">var</span> memo = [<span class="number">1</span>];</span><br><span class="line">  <span class="keyword">var</span> count = <span class="number">0</span>;</span><br><span class="line">  <span class="keyword">var</span> fac = <span class="function"><span class="keyword">function</span>(<span class="params">i</span>)</span>&#123;</span><br><span class="line">    count++;</span><br><span class="line">    <span class="keyword">var</span> result = memo[i];</span><br><span class="line">    <span class="keyword">if</span>(<span class="keyword">typeof</span> result === <span class="string">'number'</span>)&#123;</span><br><span class="line">      <span class="built_in">console</span>.log(<span class="string">'调用次数：'</span> + count); </span><br><span class="line">      <span class="keyword">return</span> result;</span><br><span class="line">    &#125; </span><br><span class="line">    result = i*fac(i<span class="number">-1</span>);</span><br><span class="line">    memo[i] = result;</span><br><span class="line">    <span class="keyword">return</span> result;</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">return</span> fac;</span><br><span class="line">&#125;)();</span><br><span class="line"><span class="keyword">for</span>(<span class="keyword">var</span> i=<span class="number">0</span>;i&lt;=<span class="number">10</span>;i++)&#123;</span><br><span class="line">  <span class="built_in">console</span>.log(factorial(i)); </span><br><span class="line">&#125;</span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">1</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">1</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">3</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">1</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">5</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">2</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">7</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">6</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">9</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">24</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">11</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">120</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">13</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">720</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">15</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">5040</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">17</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">40320</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">19</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">362880</span></span><br><span class="line">VM1494:<span class="number">8</span> 调用次数：<span class="number">21</span></span><br><span class="line">VM1494:<span class="number">18</span> <span class="number">3628800</span></span><br></pre></td></tr></table></figure>
</li>
</ul>

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">JavaScript</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/26/JavaScript-闭包那些事儿/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-JavaScript-Object的底层数据结构" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/24/JavaScript-Object的底层数据结构/">JavaScript Object的底层数据结构</a>
    </h1>
  

        
        <a href="/2019/05/24/JavaScript-Object的底层数据结构/" class="archive-article-date">
  	<time datetime="2019-05-24T14:28:15.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-24</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <h3 id="JavaScript-Object的底层数据结构"><a href="#JavaScript-Object的底层数据结构" class="headerlink" title="JavaScript Object的底层数据结构"></a>JavaScript Object的底层数据结构</h3><h4 id="对象的属性类型"><a href="#对象的属性类型" class="headerlink" title="对象的属性类型"></a>对象的属性类型</h4><ul>
<li><p><code>数据属性</code></p>
<ul>
<li><p><code>概念</code>：数据属性包括一个数据值得位置</p>
</li>
<li><p><code>描述符</code>: </p>
<p>| 特性          | 含义                                                         |<br>| ———— | ———————————————————— |<br>| Configurable | 表示能否通过delete删除属性从⽽而重新定义属性，能否修改属性的特性，或者能否把属性修改为访问器器属性，特性默认值为<strong>true</strong> |<br>| Enumberable  | 表示能否通过for-in循环返回属性，特性默认值为<strong>true</strong>         |<br>| Wtiteable    | 表示能否修改属性的值，特性默认值为<strong>true</strong>                   |<br>| Value        | 包含这个属性的数据值，读取属性值/写⼊入属性值，从这个位置读/把新值保存在这个位置，这个特性的默认值为undefined |</p>
</li>
<li><p><code>代码示例</code>：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 字面量方式</span></span><br><span class="line"><span class="keyword">const</span> obj = &#123;</span><br><span class="line">	val: <span class="number">1</span></span><br><span class="line">&#125;</span><br><span class="line"><span class="comment">// 构造函数方式</span></span><br><span class="line"><span class="keyword">const</span> obj = <span class="keyword">new</span> <span class="built_in">Object</span>();</span><br><span class="line">obj.val = <span class="number">1</span>;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 修改属性默认特性函数方式</span></span><br><span class="line"><span class="keyword">const</span> obj = &#123;&#125;;</span><br><span class="line"><span class="built_in">Object</span>.defineProperty(obj,<span class="string">'val'</span>, &#123;</span><br><span class="line">  configurable: <span class="literal">true</span>,</span><br><span class="line">  enumberable: <span class="literal">true</span>,</span><br><span class="line">  writeable: <span class="literal">true</span>,</span><br><span class="line">  value: <span class="number">1</span></span><br><span class="line">&#125;)</span><br><span class="line"><span class="comment">/* 需要注意的是，此处用defineProperty方法定义新属性，如果不指定 &lt;描述符对象&gt; , 那么 configurable, enumberable, writeable属性会变false ，若是已定义的属性无此情况 */</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>根据 value 的类型分类</p>
<ul>
<li>基本数据类型属性 : </li>
<li>引⽤数据类型的属性 : </li>
</ul>
</li>
</ul>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> person = &#123;&#125;;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 基本数据类型属性</span></span><br><span class="line">person.name = <span class="string">'serebii'</span>;</span><br><span class="line">person.age = <span class="number">18</span>;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 引用数据类型属性</span></span><br><span class="line">person.getInfo = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">	<span class="keyword">const</span> &#123; name, age &#125; = <span class="keyword">this</span>;</span><br><span class="line">	<span class="keyword">return</span>  &#123;</span><br><span class="line">    name, age</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 访问器</span></span><br><span class="line"><span class="built_in">Object</span>.defineProperty(person, <span class="string">'isAdult'</span>, &#123; </span><br><span class="line">  get: <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">if</span> (person.age &gt;= <span class="number">18</span>) &#123;</span><br><span class="line">      <span class="keyword">return</span> <span class="literal">true</span>;</span><br><span class="line">    &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">      <span class="keyword">return</span> <span class="literal">false</span>;</span><br><span class="line">		&#125; </span><br><span class="line">  &#125;</span><br><span class="line">&#125;);</span><br></pre></td></tr></table></figure>
</li>
</ul>
<ul>
<li><p>访问器属性</p>
<ul>
<li><p><code>概念</code>：访问器属性不含有数据值；它包括一对<code>getter</code>和<code>setter</code>函数(非必须)；读取访问器属性时，调用<code>getter</code>返回有效值；写入访问器属性时，调用<code>setter</code>写入有效值</p>
</li>
<li><p><code>描述符</code>：</p>
<p>| 特性          | 含义                                                          |<br>| ———— | ———————————————————— |<br>| Configurable | 表示能否通过delete删除属性从⽽而重新定义属性，能否修改属性的特性，或者能否把属性修改为访问器器属性，特性默认值为<strong>true</strong> |<br>| Enumberable  | 表示能否通过for-in循环返回属性，特性默认值为<strong>true</strong>         |<br>| Get          | 在读取属性时调⽤用的函数，默认值为<strong>undefined</strong>              |<br>| Set          | 在写⼊入属性时调⽤用的函数，默认值为<strong>undefined</strong>            |</p>
</li>
<li><p><code>代码示例</code></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line">    <span class="comment">// 字面量方式</span></span><br><span class="line">    <span class="keyword">const</span> obj = &#123;</span><br><span class="line">    	_val: <span class="number">1</span>,</span><br><span class="line">    	get val() &#123;</span><br><span class="line">    		<span class="keyword">return</span> <span class="keyword">this</span>._val</span><br><span class="line">    	&#125;,</span><br><span class="line">    	set val(newVal) &#123;</span><br><span class="line">    		<span class="keyword">this</span>._val += newVal</span><br><span class="line">    	&#125;</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    <span class="comment">// 修改属性默认特性函数方式</span></span><br><span class="line">    <span class="keyword">var</span> obj = &#123;</span><br><span class="line">    	_val: <span class="number">1</span></span><br><span class="line">    &#125;;</span><br><span class="line">    </span><br><span class="line">    <span class="built_in">Object</span>.defineProperty(obj,<span class="string">'val'</span>,&#123;</span><br><span class="line">    	configrable: <span class="literal">true</span>,</span><br><span class="line">    	enumberable: <span class="literal">true</span>,</span><br><span class="line">    	get: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    		<span class="keyword">return</span> <span class="keyword">this</span>._val;</span><br><span class="line">    	&#125;,</span><br><span class="line">    	set: <span class="function"><span class="keyword">function</span>(<span class="params">newVal</span>) </span>&#123;</span><br><span class="line">    		<span class="keyword">this</span>._val += newVal;</span><br><span class="line">    	&#125;</span><br><span class="line">&#125;)</span><br><span class="line">    </span><br><span class="line">    obj.val; <span class="comment">// 1</span></span><br><span class="line">    obj.val = <span class="number">2</span>;</span><br><span class="line">    obj.val; <span class="comment">// 3</span></span><br></pre></td></tr></table></figure>
</li>
</ul>
</li>
</ul>
<h4 id="对象的存储结构"><a href="#对象的存储结构" class="headerlink" title="对象的存储结构"></a>对象的存储结构</h4><p>从表象看，对象是以Hash结构存储的，⽤用&lt;Key，Value&gt;键值对表示对象的属性，Key的数据类型为字符串，Value 的数据类型是结构体，即对象是以&lt;String,Object&gt;类型的<code>HashMap结构存储</code>的。 </p>
<hr>
<p>为什么说Key的数据类型是字符串，简单的看：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> o = &#123;</span><br><span class="line">	<span class="string">'1'</span>: <span class="number">1</span>,</span><br><span class="line">	<span class="number">2</span>:<span class="number">2</span>,</span><br><span class="line">	<span class="string">'3'</span>:<span class="number">3</span>,</span><br><span class="line">	<span class="number">4</span>: <span class="number">4</span></span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> key1 = <span class="string">'1'</span>;</span><br><span class="line">o[key1] <span class="comment">// 1</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> key2 = <span class="number">2</span>;</span><br><span class="line">key2.toString(); <span class="comment">// "2"</span></span><br><span class="line">o[key2] <span class="comment">// 2</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">var</span> key3 = &#123;</span><br><span class="line">	toString: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123; <span class="keyword">return</span> <span class="string">'3'</span> &#125;</span><br><span class="line">&#125;</span><br><span class="line">o[key3] <span class="comment">// 3</span></span><br><span class="line"><span class="keyword">var</span> key4 = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;&#125;;</span><br><span class="line"></span><br><span class="line">key4.toString = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123; <span class="keyword">return</span> <span class="number">4</span> &#125;;</span><br><span class="line">o[key4] <span class="comment">// 4</span></span><br></pre></td></tr></table></figure>
<p>如果Key是<code>引⽤类型</code>会调⽤用原型对象中的toString()函数。</p>
<p>如果是<code>基本数据类型</code>是也会将基本数据类型转化为对应字符串。</p>
<p>解释器会尽力将其转化为字符串。</p>
<hr>
<p>至于Value是结构体那就要细说了。</p>
<h4 id="对象属性详解"><a href="#对象属性详解" class="headerlink" title="对象属性详解"></a>对象属性详解</h4><p>以Chrome 的V8看结构</p>
<p>引用李银城老师的《从<strong>Chrome</strong>源码看<strong>JS Object</strong>的实现》所述：</p>
<blockquote>
<p>V8⾥面所有的数据类型的根⽗父类都是Object，Object派⽣生HeapObject，提供存储基本功能，往下的<br>JSReceiver⽤用于原型查找，再往下的JSObject就是JS⾥面的Object，Array/Function/Date等继承于<br>JSObject。左边的FixedArray是实际存储数据的地方。</p>
</blockquote>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/1.png">
<p><code>FixedArray</code> 是一个类似于数组的类，它表示一段连续的内存，它存的都是<code>对象的指针</code>或者直接是<code>整型数据类型</code></p>
<p>其表现形式可以抽象为如下代码： </p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">var</span> obj = &#123;</span><br><span class="line">	name: <span class="string">"serebii"</span>,</span><br><span class="line">  age: <span class="number">18</span>,</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 转为FixedArray为 ['name', 'serebii', 'age', 18]</span></span><br><span class="line"><span class="comment">// 或者 这样表示 key 为索引</span></span><br><span class="line"><span class="comment">/*</span></span><br><span class="line"><span class="comment">var fixedArray = &#123;</span></span><br><span class="line"><span class="comment">	0: 'name'的内存地址</span></span><br><span class="line"><span class="comment">	1: 'serebii'的内存地址</span></span><br><span class="line"><span class="comment">	2: 'age'的内存地址</span></span><br><span class="line"><span class="comment">	3: 18整型值</span></span><br><span class="line"><span class="comment">&#125;</span></span><br><span class="line"><span class="comment">*/</span></span><br></pre></td></tr></table></figure>
<blockquote>
<p><strong>FixedArray</strong>主要用于表示数据的存储位置，在它上面还有一个<strong>Map</strong>，这个Map用于<u>表示数据的结构</u>，用来操作FixedArray表示的这段内存；它还有一个叫做  <strong>descriptors</strong>  表示它的数据结构。descriptor记录了每个key-value对，以及它们在FixedArray里面的index. 后续对properties的操作基本上通过descriptor进行。</p>
</blockquote>
<p>再来看另一段引用叙述：</p>
<blockquote>
<p> 每一个JS对象都一个<strong>隐藏类</strong>与之关联，隐藏类存储有 <strong><u>对象结构信息</u></strong> (属性数和对象原型的引⽤)，以及属性名到属性索引的映射；<u>隐藏类是动态创建的，随着对象的变化而动态更新。</u></p>
<p>在V8中，位于堆内存并由GC管理的<u>所有JS对象的第一个字段都指向隐藏类</u>。 隐藏类存储中包含属性的<br>数量，和⼀个指向<strong>描述符数组</strong>的指针。 在这个描述符数组中包含有命名属性的信息，例如命名属性的名<br>称和存储属性值的位置。</p>
</blockquote>
<p>结合理解可以得出:</p>
<ul>
<li><p><strong>隐藏类</strong>指的是<code>FixedArray</code>之上的<code>Map</code>;</p>
</li>
<li><p>指向<strong>描述符数组</strong>的指针即为<code>descriptors</code>；</p>
</li>
<li><p><strong>描述符数组</strong>即为 <code>FixedArray</code>;</p>
</li>
</ul>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/2.png">
<hr>
<p>那么这个<code>Map</code>隐藏类究竟有什么用呢？</p>
<p>有个了这个<code>Map</code>对象之后就可以创建JS对象了啊，用它来创建一个JSObect，重新开辟一段内存，把map的内容拷过去，然后把属性们 <code>properties</code>设置到<code>map</code>的<code>FixedArray</code>里面；在设置<code>properties</code>的同时，会初始化一个<code>searchCache</code>，这个<code>searchCache</code>支持哈希查找某个属性。(稍后讲<code>searchCache</code>)</p>
<blockquote>
<p>注意：具有相同结构的JS对象(相同顺序和相同命名的属性)，他们的隐藏类会指向同一个，以此达到复用的目的。对于不同结构的JS对象将使用不同的HiddenClass。</p>
</blockquote>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/3.png">
<blockquote>
<p>每次添加新属性时，都会更改对象的HiddenClass。V8维护了一个把HiddenClasses链接在一起的转换树。按相同属性添加顺序将得到一样的隐藏类。</p>
</blockquote>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/4.png">
<blockquote>
<p>如果我们创建一个添加了不同属性的新对象(‘d’)，则会创建一个单独的隐藏类分支。</p>
</blockquote>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/5.png">
<blockquote>
<p><strong>结论</strong>：</p>
<ul>
<li>具有相同结构的对象（相同属性的相同顺序）具有相同的HiddenClass</li>
<li>默认情况下，每个添加的新命名属性都会导致创建一个新的HiddenClass。</li>
<li>添加数组索引属性不会创建新的HiddenClasses。</li>
</ul>
</blockquote>
<hr>
<h4 id="对象的属性值查找方式"><a href="#对象的属性值查找方式" class="headerlink" title="对象的属性值查找方式"></a>对象的属性值查找方式</h4><ul>
<li>字符串哈希查找</li>
</ul>
<p>这里来说说刚才提到的<code>searchCache</code></p>
<blockquote>
<p>简而言之，这种<code>searchCache</code>查找只支持属性个数小于等于128的，如果属性个数大于128个，将不采用<code>cache</code>存储和查找的方式。而是直接使用一个<code>hashtable</code>哈希表。</p>
</blockquote>
<ul>
<li>字符串哈希表查找</li>
</ul>
<blockquote>
<p>如果属性个数大于128时，将按照属性的个数消耗的空间创建和扩展map存储，不再创建cache。同时这个map就会被标记为dictionary_map，即哈希表。</p>
<p>往这个哈希表插入一个元素前，会先检查表的容量是否足够，不够进行扩容。</p>
</blockquote>
<blockquote>
<p>为什么在不大于128个属性的时候要专门搞一个searchCache呢，是因为searchCache比哈希表快么，快在哪里？我想这两者的区别在于searchCache不会冲突，每次都是直接定位，而hashTable如果冲突了需要不断地找下一个元素，增加了比较次数。当属性比较少，并且有几个属性经常被用到的时候，searchCache应该会有明显的优势。</p>
</blockquote>
<ul>
<li>数字索引哈希查找</li>
</ul>
<p>如果属性的<code>key</code>数字的话，值会直接存放在一个<code>elements</code>有序数组里，它的key值直接作为它的index；<code>elements</code>的初始化大小是19个元素，空的索引用hole元素填充。</p>
<blockquote>
<p>这种用<u>数组</u>表示的属性在源码里面叫<strong>快属性</strong>FastElements，而用<u>哈希表</u>的叫做<strong>慢属性</strong>SlowElements。当hole太多的时候会变成<strong>慢属性</strong>slowElements。</p>
</blockquote>
<h4 id="对象属性的命名属性"><a href="#对象属性的命名属性" class="headerlink" title="对象属性的命名属性"></a>对象属性的命名属性</h4><ul>
<li><p>内嵌属性与普通属性</p>
<ul>
<li>V8支持对象内属性，存储在对象本身，可以直接访问，速度最快。</li>
</ul>
<ul>
<li>内嵌属性的数量由对象的初始大小预先确定。</li>
<li>如果添加的属性多于对象中的空间，则它们将存储在隐藏类链上，由隐藏类指向的一个属性数组。</li>
</ul>
</li>
</ul>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/6.png">
<ul>
<li><p>(普通属性中的)快属性与慢属性</p>
<ul>
<li><p>直接存储在属性数组(如上图中的Properties结构)中的属性为’快属性’。可通过属性数组中的索引访问，若要从属性名称获取属性数组中的实际位置，必须查看HiddenClass上的描述符数组才能知道(如上)。</p>
</li>
<li><p>慢属性使用HashMap作为属性存储，所有属性元信息不再存储在HiddenClass上的描述符数组中，而是直接存储在属性Hash中(没有缓存，所以叫慢属性)。</p>
</li>
</ul>
</li>
</ul>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/7.png">
<p>​            <strong>注意</strong>：过多的添加或删除属性，会从快属性模式切换为慢属性模式。</p>
<blockquote>
<p><strong>结论</strong>：</p>
<ul>
<li>三种不同的命名属性类型：in-object，fast和slow(dictionary)。</li>
<li>内嵌属性直接存储在对象本身上，并提供最快的访问。</li>
<li>快速属性存在于属性存储中，所有元信息都存储在HiddenClass上的描述符数组中。</li>
<li>慢属性存在于自包含的属性字典中，不再通过HiddenClass共享元信息。</li>
<li>慢属性提供有效的属性删除和添加，但访问速度比其他两种类型慢。</li>
</ul>
</blockquote>
<ul>
<li><p>连续和有缺口的数组索引属性</p>
<ol>
<li>如果删除索引元素，或者例如没有定义它，则会在连续存储中出现漏洞。一个简单的例子是[1，，3]，其中第二个项是一个缺口。</li>
</ol>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">const o = [&quot;a&quot;, &quot;b&quot;, &quot;c&quot;];</span><br><span class="line">console.log(o[1]);          // Prints &quot;b&quot;.</span><br><span class="line"></span><br><span class="line">delete o[1];                // Introduces a hole in the elements store.</span><br><span class="line">console.log(o[1]);          // Prints &quot;undefined&quot;; property 1 does not exist.</span><br><span class="line">o.\_\_proto\_\_ = &#123;1: &quot;B&quot;&#125;;     // Define property 1 on the prototype.</span><br><span class="line"></span><br><span class="line">console.log(o[0]);          // Prints &quot;a&quot;.</span><br><span class="line">console.log(o[1]);          // Prints &quot;B&quot;.</span><br><span class="line">console.log(o[2]);          // Prints &quot;c&quot;.</span><br><span class="line">console.log(o[3]);          // Prints undefined</span><br></pre></td></tr></table></figure>
</li>
</ul>
<img src="/2019/05/24/JavaScript-Object的底层数据结构/8.png">
<p>  当有缺口的时候会在该位置打上the_hole标记表示不存在的属性，可以大大提高数组操作效率。</p>
<ul>
<li><p>快速数组索引属性或Hash数组索引属性</p>
<ol>
<li>快速数组索引属性是简单的VM内部数组，其中属性索引映射到数组索引属性存储中的索引。但是，该结构对于较大的数组但占用元素较少的情况相当浪费内存，这种情况会使用HashMap来节省内存，但代价是访问速度稍慢。</li>
</ol>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">const sparseArray = [];</span><br><span class="line">sparseArray [9999] =&apos;foo&apos;; //创建一个包含字典元素的数组。</span><br></pre></td></tr></table></figure>
<p>注意：只要使用自定义描述符定义索引属性，V8就会转向慢数组索引属性：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">const array = [];</span><br><span class="line">Object.defineProperty(array, 0, &#123;value: &quot;fixed&quot;, configurable: false&#125;);</span><br><span class="line">console.log(array[0]);      // Prints &quot;fixed&quot;.</span><br><span class="line">array[0] = &quot;other value&quot;;   // Cannot override index 0.</span><br><span class="line">console.log(array[0]);      // Still prints &quot;fixed&quot;.</span><br></pre></td></tr></table></figure>
</li>
</ul>

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">JavaScript</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/24/JavaScript-Object的底层数据结构/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-Egg上传文件" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/18/Egg上传文件/">Egg上传文件</a>
    </h1>
  

        
        <a href="/2019/05/18/Egg上传文件/" class="archive-article-date">
  	<time datetime="2019-05-18T03:02:30.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-18</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <h3 id="Egg-文件上传"><a href="#Egg-文件上传" class="headerlink" title="Egg 文件上传"></a>Egg 文件上传</h3><hr>
<h4 id="配置插件"><a href="#配置插件" class="headerlink" title="配置插件"></a>配置插件</h4><p>Mutipart 插件是内置的所以直接在<code>plugin</code>打开就OK</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// config/plugin.js</span></span><br><span class="line">multipart: &#123;</span><br><span class="line">  enable: <span class="literal">true</span>,</span><br><span class="line">    package: <span class="string">'egg-multipart'</span>,</span><br><span class="line">&#125;,</span><br></pre></td></tr></table></figure>
<p>同时<code>config</code>文件也需要配置, 具体配置参数：<a href="https://github.com/eggjs/egg-multipart" target="_blank" rel="noopener">传送门</a></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// config/config.default.js</span></span><br><span class="line">config.multipart = &#123;</span><br><span class="line">  mode: <span class="string">'stream'</span>,</span><br><span class="line">  <span class="comment">// 大小限制</span></span><br><span class="line">  fileSize: <span class="string">'50mb'</span>,</span><br><span class="line">  <span class="comment">// 新增白名单</span></span><br><span class="line">  fileExtensions: [</span><br><span class="line">    <span class="string">'.foo'</span>,</span><br><span class="line">    <span class="string">'.apk'</span>,</span><br><span class="line">  ],</span><br><span class="line">  <span class="comment">// 重新白名单</span></span><br><span class="line">  <span class="comment">// whitelist: [</span></span><br><span class="line">  <span class="comment">//   '.png',</span></span><br><span class="line">  <span class="comment">// ],</span></span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
<h4 id="编写controller"><a href="#编写controller" class="headerlink" title="编写controller"></a>编写controller</h4><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">'use strict'</span>;</span><br><span class="line"><span class="keyword">const</span> fs = <span class="built_in">require</span>(<span class="string">'fs'</span>);</span><br><span class="line"><span class="keyword">const</span> path = <span class="built_in">require</span>(<span class="string">'path'</span>);</span><br><span class="line"><span class="keyword">const</span> Controller = <span class="built_in">require</span>(<span class="string">'egg'</span>).Controller;</span><br><span class="line"><span class="keyword">const</span> pump = <span class="built_in">require</span>(<span class="string">'mz-modules/pump'</span>);</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> awaitWriteStream = <span class="built_in">require</span>(<span class="string">'await-stream-ready'</span>).write;</span><br><span class="line"><span class="keyword">const</span> sendToWormhole = <span class="built_in">require</span>(<span class="string">'stream-wormhole'</span>);</span><br><span class="line"></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">HomeController</span> <span class="keyword">extends</span> <span class="title">Controller</span> </span>&#123;</span><br><span class="line">  </span><br><span class="line"><span class="comment">// 上传文件</span></span><br><span class="line">  <span class="keyword">async</span> uploadFiles() &#123;</span><br><span class="line">    <span class="keyword">const</span> &#123; ctx &#125; = <span class="keyword">this</span>;</span><br><span class="line">    <span class="comment">// 获取 FileStream 文件流对象</span></span><br><span class="line">    <span class="keyword">const</span> stream = <span class="keyword">await</span> ctx.getFileStream();</span><br><span class="line">    <span class="comment">// 文件名(可以自定义文件名，此处文件名不做修饰)</span></span><br><span class="line">    <span class="keyword">const</span> filename = path.basename(stream.filename);</span><br><span class="line">    <span class="comment">// 图片存放在静态资源public/upload文件夹下</span></span><br><span class="line">    <span class="keyword">const</span> target = path.join(<span class="keyword">this</span>.config.baseDir, <span class="string">'app/public/upload'</span>, filename);</span><br><span class="line">    <span class="comment">// 生成一个文件写入 文件流</span></span><br><span class="line">    <span class="keyword">const</span> writeStream = fs.createWriteStream(target);</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 方式一: awaitStreamReady + sendToWormhole</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="keyword">try</span> &#123;</span><br><span class="line">      <span class="comment">// 写入文件</span></span><br><span class="line">      <span class="keyword">await</span> awaitStreamReady(stream.pipe(writeStream));</span><br><span class="line">    &#125; <span class="keyword">catch</span> (err) &#123;</span><br><span class="line">      <span class="comment">// 必须将上传的文件流消费掉，要不然浏览器响应会卡死</span></span><br><span class="line">      <span class="keyword">await</span> sendToWormhole(stream);</span><br><span class="line">      <span class="keyword">throw</span> err;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 方式二: pump</span></span><br><span class="line"><span class="comment">     * 该方法的针对的问题官方解释：当我们使用标准的 stream.pipe(writeStream) 时，</span></span><br><span class="line"><span class="comment">     * 如果写入流writeStream关闭 或 发送错误，那么 文件流stream不会被销毁（如上，try-catch）</span></span><br><span class="line"><span class="comment">     * 同时，当pipe管道传输完成时，没有一个callback通知完成</span></span><br><span class="line"><span class="comment">     * 「 该方法就是用于解决这两个问题的 」</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="keyword">await</span> pump(stream, writeStream);</span><br><span class="line">    <span class="keyword">this</span>.ctx.body = &#123; <span class="attr">url</span>: <span class="string">'/upload/'</span> + filename &#125;;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="built_in">module</span>.exports = HomeController;</span><br></pre></td></tr></table></figure>
<p>文件流对象它大概长这样:</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">FileStream &#123;</span><br><span class="line">  fieldname: <span class="string">'photo'</span>, <span class="comment">// 字段名</span></span><br><span class="line">  filename: <span class="string">'1.jpg'</span>, <span class="comment">// 文件名</span></span><br><span class="line">  encoding: <span class="string">'7bit'</span>, <span class="comment">// 编码</span></span><br><span class="line">  transferEncoding: <span class="string">'7bit'</span>,</span><br><span class="line">  mime: <span class="string">'image/jpeg'</span>, <span class="comment">// 类型</span></span><br><span class="line">  mimeType: <span class="string">'image/jpeg'</span>, </span><br><span class="line">  fields: &#123; <span class="attr">title</span>: <span class="string">''</span>, <span class="attr">description</span>: <span class="string">''</span>, <span class="attr">author</span>: <span class="string">''</span>, <span class="attr">content</span>: <span class="string">''</span> &#125; </span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h4 id="路由配置"><a href="#路由配置" class="headerlink" title="路由配置"></a>路由配置</h4><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// route.js</span></span><br><span class="line"><span class="built_in">module</span>.exports = <span class="function"><span class="params">app</span> =&gt;</span> &#123;</span><br><span class="line">  <span class="keyword">const</span> &#123; router, controller, io &#125; = app;</span><br><span class="line">	<span class="comment">// 上传文件</span></span><br><span class="line">  router.post(<span class="string">'/upload'</span>, controller.home.uploadFiles);</span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
<h4 id="前端界面"><a href="#前端界面" class="headerlink" title="前端界面"></a>前端界面</h4><p>这里用了 <code>vant</code>的 <code>uploader</code>组件</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line">&lt;template&gt;</span><br><span class="line">	&lt;van-uploader :after-read=&quot;onRead&quot; accept=&quot;image/*&quot; multiple&gt;</span><br><span class="line">  	&lt;van-icon name=&quot;photograph&quot; /&gt;</span><br><span class="line">  &lt;/van-uploader&gt;</span><br><span class="line">&lt;/template&gt;</span><br><span class="line"></span><br><span class="line">&lt;script&gt;</span><br><span class="line">import axios from &apos;axios&apos;;</span><br><span class="line">  export default &#123;</span><br><span class="line">    methods: &#123;</span><br><span class="line">      async onRead(file, detail) &#123;</span><br><span class="line">        //创建form对象</span><br><span class="line">        let params = new FormData(); </span><br><span class="line">        //通过append向form对象添加数据</span><br><span class="line">        //第一个参数字符串可以填任意命名，第二个根据对象属性来找到file</span><br><span class="line">        params.append(&quot;file&quot;, file.file); </span><br><span class="line">        const res = await this.$post(&apos;/upload&apos;, params, &#123;</span><br><span class="line">          headers: &#123; //添加请求头</span><br><span class="line">            &quot;Content-Type&quot;: &quot;multipart/form-data&quot;</span><br><span class="line">          &#125;</span><br><span class="line">        &#125;)</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&lt;/script&gt;</span><br></pre></td></tr></table></figure>
<h4 id="上传结果"><a href="#上传结果" class="headerlink" title="上传结果"></a>上传结果</h4><img src="/2019/05/18/Egg上传文件/1.png">
      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color4">Egg</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/18/Egg上传文件/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-JavaScript-快速生成固定长度的数组" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/15/JavaScript-快速生成固定长度的数组/">JavaScript 快速生成固定长度的数组</a>
    </h1>
  

        
        <a href="/2019/05/15/JavaScript-快速生成固定长度的数组/" class="archive-article-date">
  	<time datetime="2019-05-15T04:03:23.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-15</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <h3 id="JavaScript-快速生成固定长度的数组"><a href="#JavaScript-快速生成固定长度的数组" class="headerlink" title="JavaScript 快速生成固定长度的数组"></a>JavaScript 快速生成固定长度的数组</h3><h4 id="方法一"><a href="#方法一" class="headerlink" title="方法一"></a>方法一</h4><p>采用Array构造方式的方法生成固定长度的数组。</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">const</span> arr = <span class="built_in">Array</span>(<span class="number">1000</span>).fill(<span class="literal">null</span>).map(<span class="function">(<span class="params">i,index</span>) =&gt;</span> &#123; <span class="attr">key</span>: index&#125;);</span><br></pre></td></tr></table></figure>
<ul>
<li><p>当Array构造函数传入一个参数的时候，该参数指定了数组的长度。当Array构造函数传入参数大于等于两个的时候，数组会返回由参数组成的数组。</p>
</li>
<li><p>当Array构造函数传入一个参数且类型为Number时返回会指定长度的数组，如果为其他类型的参数，则返回一个长度为1，成员为该参数的数组</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">Array</span>(<span class="number">1</span>); <span class="comment">// [empty]</span></span><br><span class="line"><span class="built_in">Array</span>(<span class="string">'1'</span>); <span class="comment">// ["1"]</span></span><br><span class="line"><span class="built_in">Array</span>(<span class="literal">true</span>); <span class="comment">// [true]</span></span><br></pre></td></tr></table></figure>
</li>
</ul>
<ul>
<li><p>fill方法用于空数组的初始化，已有元素会全部抹去；</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">Array</span>(<span class="number">1000</span>); <span class="comment">// (1000) [empty × 1000]</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>map方法用于遍历数组，传入回调函数返回新的数组。</p>
</li>
<li><p><strong>注意：这里一定要fill(null) </strong> 因为 [empty] 是无法进行操作的</p>
</li>
</ul>
<h4 id="方法二"><a href="#方法二" class="headerlink" title="方法二"></a>方法二</h4><p>采用Array.from转换的方式</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">const</span> arr = <span class="built_in">Array</span>.from(&#123;<span class="attr">length</span>:<span class="number">1000</span>&#125;,(i,index) =&gt; &#123; <span class="attr">key</span>: index &#125;);</span><br></pre></td></tr></table></figure>
<ul>
<li><p>Array.from 方法将两类对象转换为数组： 类数组对象（本质特征有length），可遍历对象(Set, Map)</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="built_in">Array</span>.from(<span class="string">'12345'</span>); <span class="comment">// (5) ["1", "2", "3", "4", "5"]</span></span><br></pre></td></tr></table></figure>
</li>
<li><p>Array.from 接收第二个参数，作用类似Mapfn</p>
</li>
</ul>
<h4 id="方法三"><a href="#方法三" class="headerlink" title="方法三"></a>方法三</h4><p>采用slice方法</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">const</span> arr = <span class="function">(<span class="params">[].slice.call(&#123;length:<span class="number">1000</span>&#125;</span>)).<span class="params">fill</span>(<span class="params"><span class="literal">null</span></span>).<span class="params">map</span>(<span class="params">(i,index</span>) =&gt;</span> (&#123; <span class="attr">key</span>: index &#125;));</span><br></pre></td></tr></table></figure>
<ul>
<li>slice方法基于当前数组中的一个或多个项目创建一个数组，接收两个参数，即返回项的起始位置和结束位置</li>
<li>只有一个参数情况下，返回指定位置到末尾所有项</li>
<li><p>slice方法会返回新的数组，不会影响原数组</p>
</li>
<li><p><strong>注意：这里一定要fill(null) </strong> 因为 [empty] 是无法进行操作的</p>
</li>
</ul>
<h4 id="性能测试"><a href="#性能测试" class="headerlink" title="性能测试"></a>性能测试</h4><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 方法一</span></span><br><span class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">	<span class="built_in">console</span>.time();</span><br><span class="line">	<span class="keyword">const</span> arr = <span class="built_in">Array</span>(<span class="number">1000</span>).fill(<span class="literal">null</span>).map(<span class="function">(<span class="params">i,index</span>) =&gt;</span> (&#123; <span class="attr">key</span>: index &#125;));</span><br><span class="line">	<span class="built_in">console</span>.timeEnd();</span><br><span class="line">&#125;)()</span><br><span class="line"><span class="comment">// 0.10009765625ms</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 方法二</span></span><br><span class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">	<span class="built_in">console</span>.time();</span><br><span class="line">	<span class="keyword">const</span> arr = <span class="built_in">Array</span>.from(&#123;<span class="attr">length</span>:<span class="number">1000</span>&#125;,(i,index) =&gt; (&#123; <span class="attr">key</span>: index &#125;));</span><br><span class="line">	<span class="built_in">console</span>.timeEnd();</span><br><span class="line">&#125;)()</span><br><span class="line"><span class="comment">// 0.268798828125ms</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 方法三</span></span><br><span class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">	<span class="built_in">console</span>.time();</span><br><span class="line">	<span class="keyword">const</span> arr = <span class="function">(<span class="params">[].slice.call(&#123;length:<span class="number">1000</span>&#125;</span>)).<span class="params">fill</span>(<span class="params"><span class="literal">null</span></span>).<span class="params">map</span>(<span class="params">(i,index</span>) =&gt;</span> (&#123; <span class="attr">key</span>: index &#125;));</span><br><span class="line">	<span class="built_in">console</span>.timeEnd();</span><br><span class="line">&#125;)()</span><br><span class="line"><span class="comment">// 0.15185546875ms</span></span><br></pre></td></tr></table></figure>
<p>提升数量再试试</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 方法一</span></span><br><span class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">	<span class="built_in">console</span>.time();</span><br><span class="line">	<span class="keyword">const</span> arr = <span class="built_in">Array</span>(<span class="number">100000</span>).fill(<span class="literal">null</span>).map(<span class="function">(<span class="params">i,index</span>) =&gt;</span> (&#123; <span class="attr">key</span>: index &#125;));</span><br><span class="line">	<span class="built_in">console</span>.timeEnd();</span><br><span class="line">&#125;)()</span><br><span class="line"><span class="comment">// 20.754150390625ms</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 方法二</span></span><br><span class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">	<span class="built_in">console</span>.time();</span><br><span class="line">	<span class="keyword">const</span> arr = <span class="built_in">Array</span>.from(&#123;<span class="attr">length</span>:<span class="number">100000</span>&#125;,(i,index) =&gt; (&#123; <span class="attr">key</span>: index &#125;));</span><br><span class="line">	<span class="built_in">console</span>.timeEnd();</span><br><span class="line">&#125;)()</span><br><span class="line"><span class="comment">// 33.057861328125ms</span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 方法三</span></span><br><span class="line">(<span class="function"><span class="keyword">function</span>(<span class="params"></span>)</span>&#123;</span><br><span class="line">	<span class="built_in">console</span>.time();</span><br><span class="line">	<span class="keyword">const</span> arr = <span class="function">(<span class="params">[].slice.call(&#123;length:<span class="number">100000</span>&#125;</span>)).<span class="params">fill</span>(<span class="params"><span class="literal">null</span></span>).<span class="params">map</span>(<span class="params">(i,index</span>) =&gt;</span> (&#123; <span class="attr">key</span>: index &#125;));</span><br><span class="line">	<span class="built_in">console</span>.timeEnd();</span><br><span class="line">&#125;)()</span><br><span class="line"><span class="comment">// 21.39111328125ms</span></span><br></pre></td></tr></table></figure>
<h4 id="结论"><a href="#结论" class="headerlink" title="结论"></a>结论</h4><p>上述三种创建固定长度数组的方法中</p>
<p><code>Array构造函数法</code>    &gt;    <code>slice转换法</code>    &gt;    <code>Array.from转换法</code></p>

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">JavaScript</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/15/JavaScript-快速生成固定长度的数组/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-Redux-源码解读-五" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/10/Redux-源码解读-五/">Redux 源码解读 五</a>
    </h1>
  

        
        <a href="/2019/05/10/Redux-源码解读-五/" class="archive-article-date">
  	<time datetime="2019-05-10T11:45:53.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-10</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <p>前言：解读Redux 源码还剩下最后一个函数 combineReducer.js</p>
<h4 id="调用场景"><a href="#调用场景" class="headerlink" title="调用场景"></a>调用场景</h4><p>先来回顾一下Reducer在 createStore.js 的调用处理</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="function"><span class="keyword">function</span> <span class="title">createStore</span>(<span class="params">reducer, preloadedState, enhancer</span>) </span>&#123; </span><br><span class="line">	<span class="comment">// balablabala</span></span><br><span class="line">  </span><br><span class="line">  <span class="keyword">let</span> currentReducer = reducer</span><br><span class="line">  </span><br><span class="line">  currentState = currentReducer(currentState, action);</span><br><span class="line">  </span><br><span class="line">  <span class="comment">// ...</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>可以看出，Reducer接收一个当前的状态树state 和 action作为参数</p>
<p>然后一般 Reducer 长这样: </p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">const</span> initState = &#123;&#125;;</span><br><span class="line"></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">reducerFunc</span>(<span class="params">state = initState, action</span>) </span>&#123;</span><br><span class="line">  <span class="comment">// TODO</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h4 id="使用场景"><a href="#使用场景" class="headerlink" title="使用场景"></a>使用场景</h4><p>在实际业务开发过程中，单一的 Reducer 函数会使得文件过于庞大，且不易阅读和维护。</p>
<p>可以通过 <strong>combineRedcuers</strong> 将几个Reducer组合起来传入 <strong>createStore</strong>  函数，如下：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> Focus <span class="keyword">from</span> <span class="string">'./Focus'</span>;</span><br><span class="line"><span class="keyword">import</span> Message <span class="keyword">from</span> <span class="string">'./MessageCenter'</span>;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 这里增加reducers键值对</span></span><br><span class="line"><span class="keyword">const</span> reducers = combineReducers(&#123;</span><br><span class="line">  focus: Focus,</span><br><span class="line">  messageCenter: Message</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line"><span class="comment">// 正常状态管理树</span></span><br><span class="line"><span class="keyword">const</span> store = createStore(reducers, applyMiddleware(...middlewares))</span><br></pre></td></tr></table></figure>
<h4 id="源码解读"><a href="#源码解读" class="headerlink" title="源码解读"></a>源码解读</h4><h5 id="1、getUndefinedStateErrorMessage函数"><a href="#1、getUndefinedStateErrorMessage函数" class="headerlink" title="1、getUndefinedStateErrorMessage函数"></a>1、getUndefinedStateErrorMessage函数</h5><p>用途： 状态树state校验，undefined报错</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">getUndefinedStateErrorMessage</span>(<span class="params">key, action</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">const</span> actionType = action &amp;&amp; action.type</span><br><span class="line">  <span class="keyword">const</span> actionDescription =</span><br><span class="line">    (actionType &amp;&amp; <span class="string">`action "<span class="subst">$&#123;<span class="built_in">String</span>(actionType)&#125;</span>"`</span>) || <span class="string">'an action'</span></span><br><span class="line"></span><br><span class="line">  <span class="keyword">return</span> (</span><br><span class="line">    <span class="string">`Given <span class="subst">$&#123;actionDescription&#125;</span>, reducer "<span class="subst">$&#123;key&#125;</span>" returned undefined. `</span> +</span><br><span class="line">    <span class="string">`To ignore an action, you must explicitly return the previous state. `</span> +</span><br><span class="line">    <span class="string">`If you want this reducer to hold no value, you can return null instead of undefined.`</span></span><br><span class="line">  )</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h4 id="2、getUnexpectedStateShapeWarningMessage函数"><a href="#2、getUnexpectedStateShapeWarningMessage函数" class="headerlink" title="2、getUnexpectedStateShapeWarningMessage函数"></a>2、getUnexpectedStateShapeWarningMessage函数</h4><p>用途：获取不合法的state类型，存入缓存，对相关的reducer作出警告提示</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">getUnexpectedStateShapeWarningMessage</span>(<span class="params"></span></span></span><br><span class="line"><span class="function"><span class="params">  inputState,</span></span></span><br><span class="line"><span class="function"><span class="params">  reducers,</span></span></span><br><span class="line"><span class="function"><span class="params">  action,</span></span></span><br><span class="line"><span class="function"><span class="params">  unexpectedKeyCache</span></span></span><br><span class="line"><span class="function"><span class="params"></span>) </span>&#123;</span><br><span class="line">  <span class="keyword">const</span> reducerKeys = <span class="built_in">Object</span>.keys(reducers)</span><br><span class="line">  <span class="keyword">const</span> argumentName =</span><br><span class="line">    action &amp;&amp; action.type === ActionTypes.INIT</span><br><span class="line">      ? <span class="string">'preloadedState argument passed to createStore'</span></span><br><span class="line">      : <span class="string">'previous state received by the reducer'</span></span><br><span class="line"></span><br><span class="line">  <span class="keyword">if</span> (reducerKeys.length === <span class="number">0</span>) &#123;</span><br><span class="line">    <span class="keyword">return</span> (</span><br><span class="line">      <span class="string">'Store does not have a valid reducer. Make sure the argument passed '</span> +</span><br><span class="line">      <span class="string">'to combineReducers is an object whose values are reducers.'</span></span><br><span class="line">    )</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">if</span> (!isPlainObject(inputState)) &#123;</span><br><span class="line">    <span class="keyword">return</span> (</span><br><span class="line">      <span class="string">`The <span class="subst">$&#123;argumentName&#125;</span> has unexpected type of "`</span> +</span><br><span class="line">      &#123;&#125;.toString.call(inputState).match(<span class="regexp">/\s([a-z|A-Z]+)/</span>)[<span class="number">1</span>] +</span><br><span class="line">      <span class="string">`". Expected argument to be an object with the following `</span> +</span><br><span class="line">      <span class="string">`keys: "<span class="subst">$&#123;reducerKeys.join(<span class="string">'", "'</span>)&#125;</span>"`</span></span><br><span class="line">    )</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">const</span> unexpectedKeys = <span class="built_in">Object</span>.keys(inputState).filter(</span><br><span class="line">    key =&gt; !reducers.hasOwnProperty(key) &amp;&amp; !unexpectedKeyCache[key]</span><br><span class="line">  )</span><br><span class="line"></span><br><span class="line">  unexpectedKeys.forEach(<span class="function"><span class="params">key</span> =&gt;</span> &#123;</span><br><span class="line">    unexpectedKeyCache[key] = <span class="literal">true</span></span><br><span class="line">  &#125;)</span><br><span class="line"></span><br><span class="line">  <span class="keyword">if</span> (action &amp;&amp; action.type === ActionTypes.REPLACE) <span class="keyword">return</span></span><br><span class="line"></span><br><span class="line">  <span class="keyword">if</span> (unexpectedKeys.length &gt; <span class="number">0</span>) &#123;</span><br><span class="line">    <span class="keyword">return</span> (</span><br><span class="line">      <span class="string">`Unexpected <span class="subst">$&#123;unexpectedKeys.length &gt; <span class="number">1</span> ? <span class="string">'keys'</span> : <span class="string">'key'</span>&#125;</span> `</span> +</span><br><span class="line">      <span class="string">`"<span class="subst">$&#123;unexpectedKeys.join(<span class="string">'", "'</span>)&#125;</span>" found in <span class="subst">$&#123;argumentName&#125;</span>. `</span> +</span><br><span class="line">      <span class="string">`Expected to find one of the known reducer keys instead: `</span> +</span><br><span class="line">      <span class="string">`"<span class="subst">$&#123;reducerKeys.join(<span class="string">'", "'</span>)&#125;</span>". Unexpected keys will be ignored.`</span></span><br><span class="line">    )</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h4 id="3、assertReducerShape函数"><a href="#3、assertReducerShape函数" class="headerlink" title="3、assertReducerShape函数"></a>3、assertReducerShape函数</h4><p>用途：校验reducers初始化返回的state的合法性, 需要返回初始值state</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">assertReducerShape</span>(<span class="params">reducers</span>) </span>&#123;</span><br><span class="line">  <span class="comment">// 遍历类型校验完成后的 reducers</span></span><br><span class="line">  <span class="built_in">Object</span>.keys(reducers).forEach(<span class="function"><span class="params">key</span> =&gt;</span> &#123;</span><br><span class="line">    <span class="keyword">const</span> reducer = reducers[key]</span><br><span class="line">    <span class="keyword">const</span> initialState = reducer(<span class="literal">undefined</span>, &#123; <span class="attr">type</span>: ActionTypes.INIT &#125;)</span><br><span class="line">		</span><br><span class="line">    <span class="comment">// 校验 reducer 初始化生成的 state 的合法性</span></span><br><span class="line">    <span class="comment">// 若返回undefined 则不合法。 </span></span><br><span class="line">    <span class="comment">// 在传递给 reducer 的初始状态为定义的情况下，需要显示返回</span></span><br><span class="line">    <span class="comment">// 如果不想设置值得话，可以设置为 null 来替换 undefined</span></span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">typeof</span> initialState === <span class="string">'undefined'</span>) &#123;</span><br><span class="line">      <span class="keyword">throw</span> <span class="keyword">new</span> <span class="built_in">Error</span>(</span><br><span class="line">        <span class="string">`Reducer "<span class="subst">$&#123;key&#125;</span>" returned undefined during initialization. `</span> +</span><br><span class="line">          <span class="string">`If the state passed to the reducer is undefined, you must `</span> +</span><br><span class="line">          <span class="string">`explicitly return the initial state. The initial state may `</span> +</span><br><span class="line">          <span class="string">`not be undefined. If you don't want to set a value for this reducer, `</span> +</span><br><span class="line">          <span class="string">`you can use null instead of undefined.`</span></span><br><span class="line">      )</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    <span class="comment">// 校验 reducer 类型未知，为随机类型时, 不能试图处理 ActionTypes.INIT 以及其他命名空间里的reducer</span></span><br><span class="line">    <span class="comment">// 他们被认为是私有的类型。</span></span><br><span class="line">		<span class="comment">// 相反，你必须返回当前状态 state 为任何未知的action, 除非他是 undefined。</span></span><br><span class="line">    <span class="comment">// 无论何种动作类型，你必须返回初始状态。</span></span><br><span class="line">    <span class="comment">// 初始状态不能是undefined，但可以为null</span></span><br><span class="line">    <span class="keyword">if</span> (</span><br><span class="line">      <span class="keyword">typeof</span> reducer(<span class="literal">undefined</span>, &#123;</span><br><span class="line">        type: ActionTypes.PROBE_UNKNOWN_ACTION()</span><br><span class="line">      &#125;) === <span class="string">'undefined'</span></span><br><span class="line">    ) &#123;</span><br><span class="line">      <span class="keyword">throw</span> <span class="keyword">new</span> <span class="built_in">Error</span>(</span><br><span class="line">        <span class="string">`Reducer "<span class="subst">$&#123;key&#125;</span>" returned undefined when probed with a random type. `</span> +</span><br><span class="line">          <span class="string">`Don't try to handle <span class="subst">$&#123;</span></span></span><br><span class="line"><span class="string"><span class="subst">            ActionTypes.INIT</span></span></span><br><span class="line"><span class="string"><span class="subst">          &#125;</span> or other actions in "redux/*" `</span> +</span><br><span class="line">          <span class="string">`namespace. They are considered private. Instead, you must return the `</span> +</span><br><span class="line">          <span class="string">`current state for any unknown actions, unless it is undefined, `</span> +</span><br><span class="line">          <span class="string">`in which case you must return the initial state, regardless of the `</span> +</span><br><span class="line">          <span class="string">`action type. The initial state may not be undefined, but can be null.`</span></span><br><span class="line">      )</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;)</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h4 id="4、combineRedcuers-本体"><a href="#4、combineRedcuers-本体" class="headerlink" title="4、combineRedcuers 本体"></a>4、combineRedcuers 本体</h4><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Turns an object whose values are different reducer functions, into a single</span></span><br><span class="line"><span class="comment"> * reducer function. It will call every child reducer, and gather their results</span></span><br><span class="line"><span class="comment"> * into a single state object, whose keys correspond to the keys of the passed</span></span><br><span class="line"><span class="comment"> * reducer functions.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * 将值为不同reducer函数的对象转换为单个reducer函数。</span></span><br><span class="line"><span class="comment"> * 它将调用每个子reducer，并将其结果收集到一个状态对象中，该对象的键对应于传递的reducer函数的键。</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * @param &#123;Object&#125; reducers An object whose values correspond to different</span></span><br><span class="line"><span class="comment"> * reducer functions that need to be combined into one. One handy way to obtain</span></span><br><span class="line"><span class="comment"> * it is to use ES6 `import * as reducers` syntax. The reducers may never return</span></span><br><span class="line"><span class="comment"> * undefined for any action. Instead, they should return their initial state</span></span><br><span class="line"><span class="comment"> * if the state passed to them was undefined, and the current state for any</span></span><br><span class="line"><span class="comment"> * unrecognized action.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * reducers一个对象，其值对应于需要合并为一个的不同reducer函数。</span></span><br><span class="line"><span class="comment"> * 获得它的一个方便方法是使用ES6`import *作为reducers`语法。对于任何操作，</span></span><br><span class="line"><span class="comment"> * reducers可能永远不会返回undefined。</span></span><br><span class="line"><span class="comment"> * 相反，如果传递给它们的状态未定义，它们应返回其初始状态，以及任何无法识别的操作的当前状态。</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * @returns &#123;Function&#125; A reducer function that invokes every reducer inside the</span></span><br><span class="line"><span class="comment"> * passed object, and builds a state object with the same shape.</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> * 一个reducer函数，它调用传递的对象内的每个reducer，并构建一个具有相同形状的状态对象。</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="function"><span class="keyword">function</span> <span class="title">combineReducers</span>(<span class="params">reducers</span>) </span>&#123;</span><br><span class="line">  <span class="comment">// 遍历 reducers 对象, 类型校验，并拷贝 reducers</span></span><br><span class="line">  <span class="comment">// 排除 value不为 function的成员</span></span><br><span class="line">  <span class="keyword">const</span> reducerKeys = <span class="built_in">Object</span>.keys(reducers);</span><br><span class="line">  <span class="keyword">const</span> finalReducers = &#123;&#125;</span><br><span class="line">  <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">0</span>; i &lt; reducerKeys.length; i++) &#123;</span><br><span class="line">    <span class="keyword">const</span> key = reducerKeys[i]</span><br><span class="line"></span><br><span class="line">    <span class="keyword">if</span> (process.env.NODE_ENV !== <span class="string">'production'</span>) &#123;</span><br><span class="line">      <span class="keyword">if</span> (<span class="keyword">typeof</span> reducers[key] === <span class="string">'undefined'</span>) &#123;</span><br><span class="line">        warning(<span class="string">`No reducer provided for key "<span class="subst">$&#123;key&#125;</span>"`</span>)</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">typeof</span> reducers[key] === <span class="string">'function'</span>) &#123;</span><br><span class="line">      finalReducers[key] = reducers[key]</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">const</span> finalReducerKeys = <span class="built_in">Object</span>.keys(finalReducers)</span><br><span class="line">	</span><br><span class="line">  <span class="comment">// 非法key 缓存</span></span><br><span class="line">  <span class="keyword">let</span> unexpectedKeyCache</span><br><span class="line">  <span class="keyword">if</span> (process.env.NODE_ENV !== <span class="string">'production'</span>) &#123;</span><br><span class="line">    unexpectedKeyCache = &#123;&#125;</span><br><span class="line">  &#125;</span><br><span class="line">	</span><br><span class="line">  <span class="comment">// 初始化合法校验</span></span><br><span class="line">  <span class="keyword">let</span> shapeAssertionError</span><br><span class="line">  <span class="keyword">try</span> &#123;</span><br><span class="line">    assertReducerShape(finalReducers)</span><br><span class="line">  &#125; <span class="keyword">catch</span> (e) &#123;</span><br><span class="line">    shapeAssertionError = e</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">return</span> <span class="function"><span class="keyword">function</span> <span class="title">combination</span>(<span class="params">state = &#123;&#125;, action</span>) </span>&#123;</span><br><span class="line">    <span class="comment">// 校验</span></span><br><span class="line">    <span class="keyword">if</span> (shapeAssertionError) &#123;</span><br><span class="line">      <span class="keyword">throw</span> shapeAssertionError</span><br><span class="line">    &#125;</span><br><span class="line">		<span class="comment">// 校验通过，若非生产环境，把校验过程中的非法reducer 警告处理</span></span><br><span class="line">    <span class="keyword">if</span> (process.env.NODE_ENV !== <span class="string">'production'</span>) &#123;</span><br><span class="line">      <span class="keyword">const</span> warningMessage = getUnexpectedStateShapeWarningMessage(</span><br><span class="line">        state,</span><br><span class="line">        finalReducers,</span><br><span class="line">        action,</span><br><span class="line">        unexpectedKeyCache</span><br><span class="line">      )</span><br><span class="line">      <span class="keyword">if</span> (warningMessage) &#123;</span><br><span class="line">        warning(warningMessage)</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line">		</span><br><span class="line">    <span class="comment">// 遍历分发处理reducer</span></span><br><span class="line">    <span class="keyword">let</span> hasChanged = <span class="literal">false</span></span><br><span class="line">    <span class="keyword">const</span> nextState = &#123;&#125;</span><br><span class="line">    <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">0</span>; i &lt; finalReducerKeys.length; i++) &#123;</span><br><span class="line">      <span class="keyword">const</span> key = finalReducerKeys[i]</span><br><span class="line">      <span class="keyword">const</span> reducer = finalReducers[key]</span><br><span class="line">      <span class="keyword">const</span> previousStateForKey = state[key]</span><br><span class="line">      <span class="keyword">const</span> nextStateForKey = reducer(previousStateForKey, action)</span><br><span class="line">      <span class="keyword">if</span> (<span class="keyword">typeof</span> nextStateForKey === <span class="string">'undefined'</span>) &#123;</span><br><span class="line">        <span class="keyword">const</span> errorMessage = getUndefinedStateErrorMessage(key, action)</span><br><span class="line">        <span class="keyword">throw</span> <span class="keyword">new</span> <span class="built_in">Error</span>(errorMessage)</span><br><span class="line">      &#125;</span><br><span class="line">      nextState[key] = nextStateForKey</span><br><span class="line">      hasChanged = hasChanged || nextStateForKey !== previousStateForKey</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="keyword">return</span> hasChanged ? nextState : state</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">Redux</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/10/Redux-源码解读-五/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-Egg-sequlize-关联查询学习" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/10/Egg-sequlize-关联查询学习/">Egg sequlize 关联查询学习</a>
    </h1>
  

        
        <a href="/2019/05/10/Egg-sequlize-关联查询学习/" class="archive-article-date">
  	<time datetime="2019-05-10T07:01:05.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-10</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <h3 id="Egg-Sequelize-关联查询学习记录"><a href="#Egg-Sequelize-关联查询学习记录" class="headerlink" title="Egg Sequelize 关联查询学习记录"></a>Egg Sequelize 关联查询学习记录</h3><p>前言： 在egg 中使用Sequelize的前期工作 ==&gt; 贴上<a href="https://eggjs.org/zh-cn/tutorials/sequelize.html" target="_blank" rel="noopener">传送门</a></p>
<h4 id="添加migration"><a href="#添加migration" class="headerlink" title="添加migration"></a>添加migration</h4><figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">npx sequelize migration:generate --name=init-schools</span><br><span class="line"></span><br><span class="line">npx sequelize migration:generate --name=init-faculty</span><br></pre></td></tr></table></figure>
<p>migration文件夹下生成了</p>
<ul>
<li><p>20190509033049-init-schools.js</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">'use strict'</span>;</span><br><span class="line"></span><br><span class="line"><span class="built_in">module</span>.exports = &#123;</span><br><span class="line">  up: <span class="keyword">async</span> (queryInterface, Sequelize) =&gt; &#123;</span><br><span class="line">    <span class="keyword">const</span> &#123; INTEGER, STRING, TEXT, DATE &#125; = Sequelize;</span><br><span class="line">    <span class="keyword">await</span> queryInterface.createTable(<span class="string">'schools'</span>, &#123;</span><br><span class="line">      id: &#123; <span class="attr">type</span>: INTEGER, <span class="attr">primaryKey</span>: <span class="literal">true</span>, <span class="attr">autoIncrement</span>: <span class="literal">true</span>, <span class="attr">comment</span>: <span class="string">'index'</span> &#125;,</span><br><span class="line">      name: &#123; <span class="attr">type</span>: STRING(<span class="number">20</span>), <span class="attr">allowNull</span>: <span class="literal">false</span>, <span class="attr">defaultValue</span>: <span class="string">''</span>, <span class="attr">comment</span>: <span class="string">''</span> &#125;,</span><br><span class="line">      english: &#123; <span class="attr">type</span>: STRING(<span class="number">191</span>), <span class="attr">comment</span>: <span class="string">'英文名'</span> &#125;,</span><br><span class="line">      connect: &#123; <span class="attr">type</span>: STRING(<span class="number">20</span>), <span class="attr">comment</span>: <span class="string">'连接'</span> &#125;,</span><br><span class="line">      position: &#123; <span class="attr">type</span>: STRING(<span class="number">100</span>), <span class="attr">comment</span>: <span class="string">'位置'</span> &#125;,</span><br><span class="line">      explain: &#123; <span class="attr">type</span>: TEXT, <span class="attr">comment</span>: <span class="string">'描述'</span> &#125;,</span><br><span class="line">      extra: &#123; <span class="attr">type</span>: Sequelize.JSON, <span class="attr">comment</span>: <span class="string">'其他信息'</span> &#125;,</span><br><span class="line">      config: &#123; <span class="attr">type</span>: Sequelize.JSON, <span class="attr">comment</span>: <span class="string">'配置信息'</span> &#125;,</span><br><span class="line">      created_at: DATE,</span><br><span class="line">      updated_at: DATE,</span><br><span class="line">      deleted_at: DATE,</span><br><span class="line">    &#125;);</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">  down: <span class="keyword">async</span> (queryInterface, Sequelize) =&gt; &#123;</span><br><span class="line">    <span class="keyword">await</span> queryInterface.dropTable(<span class="string">'schools'</span>);</span><br><span class="line">  &#125;,</span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
</li>
</ul>
<ul>
<li><p>20190509062124-init-faculty.js</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">'use strict'</span>;</span><br><span class="line"></span><br><span class="line"><span class="built_in">module</span>.exports = &#123;</span><br><span class="line">  up: <span class="keyword">async</span> (queryInterface, Sequelize) =&gt; &#123;</span><br><span class="line">    <span class="keyword">const</span> &#123; INTEGER, DATE, STRING &#125; = Sequelize;</span><br><span class="line">    <span class="keyword">await</span> queryInterface.createTable(<span class="string">'faculties'</span>, &#123;</span><br><span class="line">      id: &#123; <span class="attr">type</span>: INTEGER, <span class="attr">primaryKey</span>: <span class="literal">true</span>, <span class="attr">autoIncrement</span>: <span class="literal">true</span>, <span class="attr">comment</span>: <span class="string">'index'</span> &#125;,</span><br><span class="line">      schoolId: &#123;</span><br><span class="line">        type: INTEGER(<span class="number">4</span>),</span><br><span class="line">        field: <span class="string">'school_id'</span>,</span><br><span class="line">        allowNull: <span class="literal">false</span>,</span><br><span class="line">        defaultValue: <span class="number">0</span>,</span><br><span class="line">        <span class="comment">// references: &#123;</span></span><br><span class="line">        <span class="comment">//   model: 'schools',</span></span><br><span class="line">        <span class="comment">//   key: 'id',</span></span><br><span class="line">        <span class="comment">// &#125;,</span></span><br><span class="line">      &#125;,</span><br><span class="line">      name: &#123; <span class="attr">type</span>: STRING, <span class="attr">comment</span>: <span class="string">'名字'</span>, <span class="attr">allowNull</span>: <span class="literal">false</span>, <span class="attr">defaultValue</span>: <span class="string">''</span> &#125;,</span><br><span class="line">      college: &#123; <span class="attr">type</span>: Sequelize.JSON &#125;,</span><br><span class="line">      hash: &#123; <span class="attr">type</span>: STRING(<span class="number">64</span>) &#125;,</span><br><span class="line">      createdAt: &#123; <span class="attr">type</span>: DATE, <span class="attr">field</span>: <span class="string">'created_at'</span> &#125;,</span><br><span class="line">      updatedAt: &#123; <span class="attr">type</span>: DATE, <span class="attr">field</span>: <span class="string">'updated_at'</span> &#125;,</span><br><span class="line">      deletedAt: &#123; <span class="attr">type</span>: DATE, <span class="attr">field</span>: <span class="string">'deleted_at'</span> &#125;,</span><br><span class="line">    &#125;);</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">  down: <span class="keyword">async</span> (queryInterface, Sequelize) =&gt; &#123;</span><br><span class="line">    <span class="keyword">await</span> queryInterface.dropTable(<span class="string">'faculty'</span>);</span><br><span class="line">  &#125;,</span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
</li>
</ul>
<h4 id="编辑Model"><a href="#编辑Model" class="headerlink" title="编辑Model"></a>编辑Model</h4><p>在model文件夹下，新建：</p>
<ul>
<li><p>school.js</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">'use strict'</span>;</span><br><span class="line"></span><br><span class="line"><span class="built_in">module</span>.exports = <span class="function"><span class="params">app</span> =&gt;</span> &#123;</span><br><span class="line">  <span class="keyword">const</span> &#123; INTEGER, STRING, TEXT, DATE &#125; = app.Sequelize;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">const</span> School = app.model.define(<span class="string">'school'</span>, &#123;</span><br><span class="line">    id: &#123; <span class="attr">type</span>: INTEGER, <span class="attr">primaryKey</span>: <span class="literal">true</span>, <span class="attr">autoIncrement</span>: <span class="literal">true</span> &#125;,</span><br><span class="line">    name: STRING(<span class="number">20</span>),</span><br><span class="line">    english: STRING(<span class="number">191</span>),</span><br><span class="line">    connect: STRING(<span class="number">20</span>),</span><br><span class="line">    position: STRING(<span class="number">100</span>),</span><br><span class="line">    explain: TEXT,</span><br><span class="line">    extra: app.Sequelize.JSON,</span><br><span class="line">    config: app.Sequelize.JSON,</span><br><span class="line">    created_at: DATE,</span><br><span class="line">    updated_at: DATE,</span><br><span class="line">    deleted_at: DATE,</span><br><span class="line">  &#125;);</span><br><span class="line"></span><br><span class="line">  School.associate = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    app.model.School.hasOne(app.model.Faculty, &#123; <span class="attr">foreignKey</span>: <span class="string">'school_id'</span>, <span class="attr">targetKey</span>: <span class="string">'id'</span> &#125;);</span><br><span class="line">  &#125;;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">return</span> School;</span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
</li>
</ul>
<ul>
<li><p>faculty.js</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">'use strict'</span>;</span><br><span class="line"></span><br><span class="line"><span class="built_in">module</span>.exports = <span class="function"><span class="params">app</span> =&gt;</span> &#123;</span><br><span class="line">  <span class="keyword">const</span> &#123; STRING, INTEGER, DATE &#125; = app.Sequelize;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">const</span> Faculty = app.model.define(<span class="string">'faculty'</span>, &#123;</span><br><span class="line">    id: &#123; <span class="attr">type</span>: INTEGER, <span class="attr">primaryKey</span>: <span class="literal">true</span>, <span class="attr">autoIncrement</span>: <span class="literal">true</span>, <span class="attr">comment</span>: <span class="string">'index'</span> &#125;,</span><br><span class="line">    school_id: &#123; <span class="attr">type</span>: INTEGER(<span class="number">4</span>), <span class="attr">field</span>: <span class="string">'school_id'</span> &#125;,</span><br><span class="line">    name: &#123; <span class="attr">type</span>: STRING, <span class="attr">comment</span>: <span class="string">'名字'</span> &#125;,</span><br><span class="line">    college: &#123; <span class="attr">type</span>: app.Sequelize.JSON &#125;,</span><br><span class="line">    hash: &#123; <span class="attr">type</span>: STRING(<span class="number">64</span>) &#125;,</span><br><span class="line">    created_at: DATE,</span><br><span class="line">    updated_at: DATE,</span><br><span class="line">    deleted_at: DATE,</span><br><span class="line">  &#125;);</span><br><span class="line"></span><br><span class="line">  Faculty.associate = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    app.model.Faculty.belongsTo(app.model.School, &#123; <span class="attr">foreignKey</span>: <span class="string">'school_id'</span>, <span class="attr">targetKey</span>: <span class="string">'id'</span> &#125;);</span><br><span class="line">  &#125;;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">return</span> Faculty;</span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
</li>
</ul>
<h4 id="编写Controller"><a href="#编写Controller" class="headerlink" title="编写Controller"></a>编写Controller</h4><p>在controller文件夹下，新建other.js</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">'use strict'</span>;</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> Controller = <span class="built_in">require</span>(<span class="string">'egg'</span>).Controller;</span><br><span class="line"></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">OtherController</span> <span class="keyword">extends</span> <span class="title">Controller</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">async</span> getSchoolsInfo() &#123;</span><br><span class="line">    <span class="keyword">const</span> &#123; ctx &#125; = <span class="keyword">this</span>;</span><br><span class="line">    <span class="keyword">const</span> res = <span class="keyword">await</span> ctx.model.Faculty.findAll(&#123;</span><br><span class="line">      include: [&#123;</span><br><span class="line">        model: ctx.model.School,</span><br><span class="line">      &#125;],</span><br><span class="line">    &#125;);</span><br><span class="line">    ctx.body = res;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="built_in">module</span>.exports = OtherController;</span><br></pre></td></tr></table></figure>
<h4 id="在路由上暴露API"><a href="#在路由上暴露API" class="headerlink" title="在路由上暴露API"></a>在路由上暴露API</h4><p>router.js中写好路由</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">router.get(<span class="string">'/schoolinfo'</span>, controller.other.getSchoolsInfo);</span><br></pre></td></tr></table></figure>
<h4 id="查看调用结果"><a href="#查看调用结果" class="headerlink" title="查看调用结果"></a>查看调用结果</h4><p>访问 <a href="http://127.0.0.1:7001/schoolinfo" target="_blank" rel="noopener">http://127.0.0.1:7001/schoolinfo</a></p>
<p>结果如下</p>
<figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line">[</span><br><span class="line">    &#123;</span><br><span class="line">        <span class="attr">"id"</span>: <span class="number">1</span>,</span><br><span class="line">        <span class="attr">"school_id"</span>: <span class="number">1</span>,</span><br><span class="line">        <span class="attr">"name"</span>: <span class="string">"信息科学与工程学院"</span>,</span><br><span class="line">        <span class="attr">"college"</span>: &#123;&#125;,</span><br><span class="line">        <span class="attr">"hash"</span>: <span class="string">"f20ef9fc-77bd-4e23-840e-2f1c8b31be2c"</span>,</span><br><span class="line">        <span class="attr">"created_at"</span>: <span class="string">"2019-05-10T06:34:32.000Z"</span>,</span><br><span class="line">        <span class="attr">"updated_at"</span>: <span class="string">"2019-05-10T06:34:32.000Z"</span>,</span><br><span class="line">        <span class="attr">"deleted_at"</span>: <span class="literal">null</span>,</span><br><span class="line">        <span class="attr">"school"</span>: &#123;</span><br><span class="line">            <span class="attr">"id"</span>: <span class="number">1</span>,</span><br><span class="line">            <span class="attr">"name"</span>: <span class="string">"南方理工大学"</span>,</span><br><span class="line">            <span class="attr">"english"</span>: <span class="string">"Shenyang Technology University"</span>,</span><br><span class="line">            <span class="attr">"connect"</span>: <span class="string">"sylg"</span>,</span><br><span class="line">            <span class="attr">"position"</span>: <span class="string">"南江省烟雨市浑南区南屏中路16号南方理工大学"</span>,</span><br><span class="line">            <span class="attr">"explain"</span>: <span class="string">"理工大学"</span>,</span><br><span class="line">            <span class="attr">"extra"</span>: &#123;&#125;,</span><br><span class="line">            <span class="attr">"config"</span>: &#123;&#125;,</span><br><span class="line">            <span class="attr">"created_at"</span>: <span class="string">"2019-05-10T06:34:28.000Z"</span>,</span><br><span class="line">            <span class="attr">"updated_at"</span>: <span class="string">"2019-05-10T06:34:28.000Z"</span>,</span><br><span class="line">            <span class="attr">"deleted_at"</span>: <span class="literal">null</span></span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">]</span><br></pre></td></tr></table></figure>

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color4">Egg</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/10/Egg-sequlize-关联查询学习/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-Redux-源码解读-四" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/09/Redux-源码解读-四/">Redux 源码解读 四</a>
    </h1>
  

        
        <a href="/2019/05/09/Redux-源码解读-四/" class="archive-article-date">
  	<time datetime="2019-05-09T12:14:26.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-09</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <blockquote>
<p>抽空解读<em>bindActionCreator.js</em></p>
</blockquote>
<h3 id="bindActionCreator-js-绑定action函数"><a href="#bindActionCreator-js-绑定action函数" class="headerlink" title="bindActionCreator.js 绑定action函数"></a>bindActionCreator.js 绑定action函数</h3><p>先贴一个目前RN项目里的其中一个应用场景</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> React, &#123; Component &#125; <span class="keyword">from</span> <span class="string">'react'</span>;</span><br><span class="line"><span class="keyword">import</span> &#123; connect &#125; <span class="keyword">from</span> <span class="string">'react-redux'</span>;</span><br><span class="line"><span class="keyword">import</span> &#123; bindActionCreators &#125; <span class="keyword">from</span> <span class="string">'redux'</span>;</span><br><span class="line"><span class="keyword">import</span> * <span class="keyword">as</span> actions <span class="keyword">from</span> <span class="string">'./File/Index'</span>;</span><br><span class="line">improt &#123; addTodo &#125; <span class="keyword">from</span> <span class="string">'./File/Index'</span>;</span><br><span class="line"></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">ComponentName</span> <span class="keyword">extends</span> <span class="title">Component</span> </span>&#123; ... &#125;</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> mapStateToProps = <span class="function">(<span class="params">state</span>) =&gt;</span> (&#123;</span><br><span class="line">  ...</span><br><span class="line">&#125;);</span><br><span class="line"></span><br><span class="line"><span class="comment">// 第一种写法</span></span><br><span class="line"><span class="keyword">const</span> mapDispatchToProps = <span class="function">(<span class="params">dispatch</span>) =&gt;</span> &#123;</span><br><span class="line">  <span class="keyword">return</span> &#123;</span><br><span class="line">    actions: bindActionCreators(actions, dispatch),</span><br><span class="line">  &#125;;</span><br><span class="line">&#125;;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 第二种写法</span></span><br><span class="line"><span class="keyword">const</span> mapDispatchToProps = &#123;</span><br><span class="line">  addTodo</span><br><span class="line">&#125;;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 第三种写法</span></span><br><span class="line"><span class="keyword">const</span> mapDispatchToProps = &#123;</span><br><span class="line">  ...actions</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> connect(mapStateToProps, mapDispatchToProps)(ComponentName);</span><br></pre></td></tr></table></figure>
<p>这两种写法本质其实都一样，就是返回一个对象，<br>这个对象包含了一堆绑定 <em>Action 创建函数</em></p>
<p><em>Action 创建函数</em>大概长这样：<br><figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">addTodo</span>(<span class="params">text</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">return</span> &#123;</span><br><span class="line">    type: ADD_TODO,</span><br><span class="line">    text</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<p>第一种写法的好处是为<em>Action 创建函数</em>创建了一个命名空间,避免在解构的时候被覆盖。</p>
<p>所以 <em>bindActionCreators</em>到底做了什么？？</p>
<p>贴代码看</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 这个函数的功能就是，创建一个绑定完action和dispatch的函数 , 这里简称为 ADFunc</span></span><br><span class="line"><span class="comment">// 调用ADFunc函数，会把 action 创建函数的结果传给 dispatch() 方法，发起一次 dispatch 过程</span></span><br><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">bindActionCreator</span>(<span class="params">actionCreator, dispatch</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">return</span> <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> dispatch(actionCreator.apply(<span class="keyword">this</span>, <span class="built_in">arguments</span>))</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Turns an object whose values are action creators, into an object with the    |  把一个装满 action创建函数的对象 Obj1，塞进另一对对象 Obj2</span></span><br><span class="line"><span class="comment"> * same keys, but with every function wrapped into a `dispatch` call so they    |  Obj2 和 Obj1 拥有相同的key , 成员是已经绑定过dispatch的 ADFunc</span></span><br><span class="line"><span class="comment"> * may be invoked directly. This is just a convenience method, as you can call  |  这样做的目的是 避免直接调用dispatch </span></span><br><span class="line"><span class="comment"> * `store.dispatch(MyActionCreators.doSomething())` yourself just fine.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * For convenience, you can also pass a single function as the first argument,  | 为方便起见，也可以使用单函数，不是非要对象才可以， 入参是单函数的话，返回的也是函数</span></span><br><span class="line"><span class="comment"> * and get a function in return.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * @param &#123;Function|Object&#125; actionCreators An object whose values are action</span></span><br><span class="line"><span class="comment"> * creator functions. One handy way to obtain it is to use ES6 `import * as`</span></span><br><span class="line"><span class="comment"> * syntax. You may also pass a single function.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * @param &#123;Function&#125; dispatch The `dispatch` function available on your Redux</span></span><br><span class="line"><span class="comment"> * store.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * @returns &#123;Function|Object&#125; The object mimicking the original object, but with</span></span><br><span class="line"><span class="comment"> * every action creator wrapped into the `dispatch` call. If you passed a</span></span><br><span class="line"><span class="comment"> * function as `actionCreators`, the return value will also be a single</span></span><br><span class="line"><span class="comment"> * function.</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="function"><span class="keyword">function</span> <span class="title">bindActionCreators</span>(<span class="params">actionCreators, dispatch</span>) </span>&#123;</span><br><span class="line">  <span class="comment">// 如果actionCreators直接是一个action创建函数，那么直接进行绑定，并返回 ADFunc</span></span><br><span class="line">  <span class="keyword">if</span> (<span class="keyword">typeof</span> actionCreators === <span class="string">'function'</span>) &#123;</span><br><span class="line">    <span class="keyword">return</span> bindActionCreator(actionCreators, dispatch)</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="comment">// 校验 -&gt; 如果不是是action创建函数群(一堆action创建函数组成的对象)，或者null 直接走人。</span></span><br><span class="line">  <span class="keyword">if</span> (<span class="keyword">typeof</span> actionCreators !== <span class="string">'object'</span> || actionCreators === <span class="literal">null</span>) &#123;</span><br><span class="line">    <span class="keyword">throw</span> <span class="keyword">new</span> <span class="built_in">Error</span>(</span><br><span class="line">      <span class="string">`bindActionCreators expected an object or a function, instead received <span class="subst">$&#123;</span></span></span><br><span class="line"><span class="string"><span class="subst">        actionCreators === <span class="literal">null</span> ? <span class="string">'null'</span> : <span class="keyword">typeof</span> actionCreators</span></span></span><br><span class="line"><span class="string"><span class="subst">      &#125;</span>. `</span> +</span><br><span class="line">        <span class="string">`Did you write "import ActionCreators from" instead of "import * as ActionCreators from"?`</span></span><br><span class="line">    )</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="comment">// 遍历每一个action创建函数，并创建 ADFunc</span></span><br><span class="line">  <span class="keyword">const</span> keys = <span class="built_in">Object</span>.keys(actionCreators)</span><br><span class="line">  <span class="keyword">const</span> boundActionCreators = &#123;&#125;</span><br><span class="line">  <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">0</span>; i &lt; keys.length; i++) &#123;</span><br><span class="line">    <span class="keyword">const</span> key = keys[i]</span><br><span class="line">    <span class="keyword">const</span> actionCreator = actionCreators[key]</span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">typeof</span> actionCreator === <span class="string">'function'</span>) &#123;</span><br><span class="line">      boundActionCreators[key] = bindActionCreator(actionCreator, dispatch)</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">  <span class="keyword">return</span> boundActionCreators</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">Redux</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/09/Redux-源码解读-四/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-CSS-linear-gradient的妙用" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/08/CSS-linear-gradient的妙用/">CSS linear-gradient的妙用</a>
    </h1>
  

        
        <a href="/2019/05/08/CSS-linear-gradient的妙用/" class="archive-article-date">
  	<time datetime="2019-05-08T11:06:21.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-08</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <p>前言：这两天接触了一些CSS的 linear-gradient, 利用该计算可以实现 <em>斑马纹</em> 和 <em>字体渐变</em></p>
<h3 id="linear-gradient-的基本介绍"><a href="#linear-gradient-的基本介绍" class="headerlink" title="linear-gradient 的基本介绍"></a>linear-gradient 的基本介绍</h3><ul>
<li>线性渐变（Linear Gradients）- 向下/向上/向左/向右/对角方向</li>
<li>径向渐变（Radial Gradients）- 由它们的中心定义</li>
</ul>
<p>语法：<br>1、linear-gradient(angle, color-stop1, color-stop2, …);<br>2、linear-gradient(side-or-corner, color-stop1, color-stop2, …);</p>
<p><em>side-or-corner</em><br>描述渐变线的起始点位置。它包含两个关键词：第一个指出垂直位置left or right，第二个指出水平位置top or bottom。关键词的先后顺序无影响，且都是可选的。<br>to top, to bottom, to left 和 to right这些值会被转换成角度0度、180度、270度和90度。其余值会被转换为一个以向顶部中央方向为起点顺时针旋转的角度。渐变线的结束点与其起点中心对称。<br><em>angle</em><br>用角度值指定渐变的方向（或角度）。角度顺时针增加。<br><em>color-stop</em><br>由一个<em>color</em>值组成，并且跟随着一个可选的终点位置（可以是一个百分比值或者是沿着渐变轴的<em>length</em>）。CSS渐变的颜色渲染采取了与SVG相同的规则。</p>
<p>MDN示例：<br><figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/* 从下到上，从蓝色开始渐变、到高度40%位置是绿色渐变开始、最后以红色结束 */</span></span><br><span class="line"><span class="selector-tag">linear-gradient</span>(0<span class="selector-tag">deg</span>, <span class="selector-tag">blue</span>, <span class="selector-tag">green</span> 40%, <span class="selector-tag">red</span>);</span><br><span class="line"><span class="comment">/* 从右往左，起始颜色red开始，向绿色渐变，渐变长度50%，</span></span><br><span class="line"><span class="comment">           再由绿色向蓝色开始渐变, 渐变长度 75% - 50% = 25%，</span></span><br><span class="line"><span class="comment">           接着由蓝色向白色开始渐变，渐变长度 75% - 75% = 0，</span></span><br><span class="line"><span class="comment">           白色一直到末尾</span></span><br><span class="line"><span class="comment">*/</span></span><br><span class="line"><span class="selector-tag">linear-gradient</span>(<span class="selector-tag">to</span> <span class="selector-tag">left</span>, <span class="selector-tag">red</span>, <span class="selector-tag">green</span> 50%, <span class="selector-tag">blue</span> 75%, <span class="selector-tag">white</span> 75%)</span><br></pre></td></tr></table></figure></p>
<h3 id="CSS-实现斑马纹"><a href="#CSS-实现斑马纹" class="headerlink" title="CSS 实现斑马纹"></a>CSS 实现斑马纹</h3><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">section</span> <span class="attr">class</span>=<span class="string">"container"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">span</span>&gt;</span>夜，结束了一如...balabalabala...<span class="tag">&lt;/<span class="name">span</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">section</span>&gt;</span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-class">.container</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">100%</span>;</span><br><span class="line">  <span class="attribute">height</span>: <span class="number">100%</span>;</span><br><span class="line"></span><br><span class="line">  <span class="attribute">display</span>: flex;</span><br><span class="line">  <span class="attribute">justify-content</span>: center;</span><br><span class="line">  <span class="attribute">align-items</span>: flex-start;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-tag">span</span> &#123;</span><br><span class="line">  <span class="attribute">background-image</span>: <span class="built_in">linear-gradient</span>(yellow 50%, green 0);</span><br><span class="line">  <span class="comment">/*</span></span><br><span class="line"><span class="comment">    此句相当于 ：    background-image: linear-gradient(180deg, yellow, yellow 50%, green 0);</span></span><br><span class="line"><span class="comment">    这样就好理解了，由黄色向黄色渐变，渐变长度 50% - 0 = 50% ；</span></span><br><span class="line"><span class="comment">                再有黄色向绿色渐变，渐变长度 0 - 50% = -50%; 即 反向渐变，那么 50% ~ 100% 就都是绿色</span></span><br><span class="line"><span class="comment"></span></span><br><span class="line"><span class="comment">                且 只要 green 后 stop小于 50%的话，50% ~100%的点，就都是绿色</span></span><br><span class="line"><span class="comment">  */</span></span><br><span class="line"></span><br><span class="line">  <span class="attribute">background-size</span>: auto <span class="number">44px</span>;</span><br><span class="line">  <span class="attribute">line-height</span>: <span class="number">22px</span>;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>贴一下斑马纹的样子吧：</p>
<img src="/2019/05/08/CSS-linear-gradient的妙用/1.png">
<p>这是 linear-gradient(yellow 50%, green 75%)的样子</p>
<img src="/2019/05/08/CSS-linear-gradient的妙用/2.png">
<h3 id="CSS-实现字体渐变"><a href="#CSS-实现字体渐变" class="headerlink" title="CSS 实现字体渐变"></a>CSS 实现字体渐变</h3><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">h1</span> <span class="attr">text</span>=<span class="string">'字体渐变'</span>&gt;</span>字体渐变<span class="tag">&lt;/<span class="name">h1</span>&gt;</span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">  <span class="selector-tag">h1</span> &#123;</span><br><span class="line">  <span class="attribute">color</span>: yellow;</span><br><span class="line">  <span class="attribute">position</span>: relative;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-tag">h1</span><span class="selector-pseudo">::before</span> &#123;</span><br><span class="line">  <span class="attribute">content</span>: <span class="built_in">attr</span>(text);</span><br><span class="line">  <span class="attribute">position</span>: absolute;</span><br><span class="line">  <span class="attribute">color</span>: green;</span><br><span class="line">  <span class="attribute">-webkit-mask</span>: <span class="built_in">linear-gradient</span>(to left, blue, transparent);</span><br><span class="line">  <span class="comment">/*</span></span><br><span class="line"><span class="comment">    此处 transparent 非常重要 </span></span><br><span class="line"><span class="comment">    若改为 linear-gradient(to left, blue, red);就无效了</span></span><br><span class="line"><span class="comment">  */</span></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>mask介绍一下：</p>
<p>属性 mask 允许使用者通过部分或者完全隐藏一个元素的可见区域。这种效果可以通过遮罩或者裁切特定区域的图片<br><a href="https://developer.mozilla.org/zh-CN/docs/Web/CSS/mask" target="_blank" rel="noopener">传送门</a></p>
<p>它长这样</p>
<img src="/2019/05/08/CSS-linear-gradient的妙用/3.png">

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color4">CSS</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/08/CSS-linear-gradient的妙用/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-CSS-实现毛玻璃效果" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/07/CSS-实现毛玻璃效果/">CSS 实现毛玻璃效果</a>
    </h1>
  

        
        <a href="/2019/05/07/CSS-实现毛玻璃效果/" class="archive-article-date">
  	<time datetime="2019-05-07T14:48:09.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-07</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <p>前言：之前看到有面试题要求实现一个毛玻璃效果，今天实现了一下。</p>
<p>目录结构：<br>|– index.html<br>|– src<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|– css<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|– style.css<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|– assets<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|– background.jpg</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"><span class="meta">&lt;!DOCTYPE html&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span> <span class="attr">lang</span>=<span class="string">"en"</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"UTF-8"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">meta</span> <span class="attr">name</span>=<span class="string">"viewport"</span> <span class="attr">content</span>=<span class="string">"width=device-width, initial-scale=1.0"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">meta</span> <span class="attr">http-equiv</span>=<span class="string">"X-UA-Compatible"</span> <span class="attr">content</span>=<span class="string">"ie=edge"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">link</span> <span class="attr">rel</span>=<span class="string">"stylesheet"</span> <span class="attr">href</span>=<span class="string">"./src/css/style.css"</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">title</span>&gt;</span>Document<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;<span class="name">section</span> <span class="attr">class</span>=<span class="string">"container"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"content"</span>&gt;</span></span><br><span class="line">      <span class="tag">&lt;<span class="name">h4</span>&gt;</span>水果可以解酒<span class="tag">&lt;/<span class="name">h4</span>&gt;</span></span><br><span class="line">      <span class="tag">&lt;<span class="name">span</span>&gt;</span></span><br><span class="line">          饮酒过量常为醉酒，醉酒多有先兆，语言渐多，舌头不灵，面颊发热发麻，头晕站立不稳……都是醉酒的先兆，这时需要解酒。不少人知道，吃一些带酸味的水果或饮服1～2两干净的食醋可以解酒。</span><br><span class="line">          苹果</span><br><span class="line">          苹果(17张)</span><br><span class="line">          这是因为，水果里含有机酸，例如青梅富含果酸，苹果里含有苹果酸，柑橘里含有柠檬酸，葡萄里含有酒石酸等，而酒里的主要成分是乙醇，有机酸能与乙醇相互作用而形成酯类物质从而达到解酒的目的。</span><br><span class="line">          同样道理，食醋也能解酒是因为食醋里含有3～5%的乙酸，乙酸能跟乙醇发生酯化反应生成乙酸乙酯。尽管带酸味的水果和食醋都能使过量乙醇的麻醉作用得以缓 解，但由于上述酯化反应在体内进行时受到多种因素的干扰，效果并不十分理想。因此，防醉酒的最佳方法是不贪杯。</span><br><span class="line">          水果VS蔬菜</span><br><span class="line">          蔬菜中的天然食物纤维非常丰富，且多为不溶性粗纤维，有利于吸附肠道内的胆固醇和胆酸，能减少胆囊炎、胆石症和大肠癌的发生，对动脉硬化、冠心病的防治也有利。</span><br><span class="line">          水果中的矿物质和微量元素不如蔬菜丰富，维生素B、维生素A的含量也相对较低，所以如果完全以水果代替蔬菜，有可能会造成以上几种维生素和微量元素的缺乏。</span><br><span class="line">          水果含有丰富的果糖，热量效应远远超过蔬菜，因此吃同样数量的水果和蔬菜，水果更容易促使肥胖超重。糖尿病和肥胖的病人，应该严格控制吃水果的量，而蔬菜则相对显得安全了许多。</span><br><span class="line">          与水果相比，蔬菜属于碱性食品，能够更有效地调整机体内环境平衡，缓解疲劳、排泄毒素。水果因含有鞣酸，调节人体内环境的效果要差一些。</span><br><span class="line">          <span class="tag">&lt;/<span class="name">span</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line">  <span class="tag">&lt;/<span class="name">section</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"><span class="selector-tag">body</span>&#123;</span><br><span class="line">  <span class="attribute">margin</span>: <span class="number">0</span>;</span><br><span class="line">&#125;</span><br><span class="line"><span class="selector-class">.container</span> &#123;</span><br><span class="line">  <span class="attribute">background-image</span>: <span class="built_in">url</span>(../assets/background.jpg);</span><br><span class="line">  <span class="attribute">background-repeat</span>: round;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">100vw</span>;</span><br><span class="line">  <span class="attribute">height</span>: <span class="number">100vh</span>;</span><br><span class="line"></span><br><span class="line">  <span class="attribute">display</span>: flex;</span><br><span class="line">  <span class="attribute">justify-content</span>: center;</span><br><span class="line">  <span class="attribute">align-items</span>: center;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.content</span> &#123;</span><br><span class="line">  <span class="attribute">width</span>: <span class="number">36vw</span>;</span><br><span class="line">  <span class="attribute">height</span>: <span class="number">30vw</span>;</span><br><span class="line">  <span class="attribute">z-index</span>: <span class="number">1</span>;</span><br><span class="line">  <span class="attribute">border-radius</span>: <span class="number">1vw</span>;</span><br><span class="line">  <span class="attribute">padding</span>: <span class="number">16px</span> <span class="number">24px</span>;</span><br><span class="line">  <span class="attribute">display</span>: flex;</span><br><span class="line">  <span class="attribute">flex-direction</span>: column;</span><br><span class="line">  <span class="attribute">justify-content</span>: flex-start;</span><br><span class="line">  <span class="attribute">align-items</span>: center;</span><br><span class="line">  <span class="attribute">position</span>: relative;</span><br><span class="line">  <span class="attribute">box-shadow</span>: <span class="number">2px</span> <span class="number">2px</span> <span class="number">8px</span> <span class="number">12px</span> <span class="built_in">rgba</span>(0, 0, 0, 0.2), <span class="number">2px</span> <span class="number">2px</span> <span class="number">8px</span> <span class="number">1px</span> <span class="built_in">rgba</span>(0, 0, 0, 0.2);</span><br><span class="line">  <span class="attribute">overflow</span>: hidden;</span><br><span class="line">  <span class="attribute">background-color</span>: <span class="built_in">rgba</span>(255,255,255,0.1);</span><br><span class="line">  <span class="comment">/* color: #2a3a4a; */</span></span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.content</span><span class="selector-pseudo">::before</span> &#123;</span><br><span class="line">  <span class="attribute">content</span>: <span class="string">''</span>;</span><br><span class="line">  <span class="attribute">display</span>: inline-block;</span><br><span class="line">  <span class="attribute">position</span>: absolute;</span><br><span class="line">  <span class="attribute">top</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">bottom</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">left</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">right</span>: <span class="number">0</span>;</span><br><span class="line">  <span class="attribute">border-radius</span>: <span class="number">1vw</span>;</span><br><span class="line"></span><br><span class="line">  <span class="attribute">filter</span>: <span class="built_in">blur</span>(10px);</span><br><span class="line">  <span class="attribute">z-index</span>: -<span class="number">1</span>;</span><br><span class="line">  <span class="comment">/* 毛玻璃实现相关 */</span></span><br><span class="line">  <span class="attribute">background-image</span>: <span class="built_in">url</span>(../assets/background.jpg);</span><br><span class="line">  <span class="attribute">background-position</span>: center center;</span><br><span class="line">  <span class="attribute">background-size</span>: <span class="number">100vw</span> <span class="number">100vh</span>;</span><br><span class="line">  <span class="attribute">background-repeat</span>: no-repeat;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p><strong>实现效果</strong></p>
<img src="/2019/05/07/CSS-实现毛玻璃效果/1.png">
      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color4">CSS</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/07/CSS-实现毛玻璃效果/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
    <article id="post-Redux-源码解读-三" class="article article-type-post  article-index" itemscope itemprop="blogPost">
  <div class="article-inner">
    
      <header class="article-header">
        
  
    <h1 itemprop="name">
      <a class="article-title" href="/2019/05/07/Redux-源码解读-三/">Redux 源码解读 三</a>
    </h1>
  

        
        <a href="/2019/05/07/Redux-源码解读-三/" class="archive-article-date">
  	<time datetime="2019-05-07T08:19:31.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2019-05-07</time>
</a>
        
      </header>
    
    <div class="article-entry" itemprop="articleBody">
      
        <blockquote>
<p>今天来解读一下源码里的<em>compose.js</em>和<em>applyMiddleware.js</em></p>
</blockquote>
<h3 id="applyMiddleware-js-应用中间件函数"><a href="#applyMiddleware-js-应用中间件函数" class="headerlink" title="applyMiddleware.js 应用中间件函数"></a>applyMiddleware.js 应用中间件函数</h3><p>这个函数，是官方提供的增强函数（enhancer）</p>
<p>我们在<em>createStore</em>中可以看到如下相关逻辑</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">createStore(reducer, preloadedState, enhancer) &#123;</span><br><span class="line">  <span class="comment">// balabalabala...</span></span><br><span class="line"></span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 处理不符合规则的（增强函数）参数 </span></span><br><span class="line"><span class="comment">   * 若(增强函数)参数符合规则，则 用（增强函数）处理 （仓库创建）函数</span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  <span class="keyword">if</span> (<span class="keyword">typeof</span> enhancer !== <span class="string">'undefined'</span>) &#123;</span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">typeof</span> enhancer !== <span class="string">'function'</span>) &#123;</span><br><span class="line">      <span class="keyword">throw</span> <span class="keyword">new</span> <span class="built_in">Error</span>(<span class="string">'Expected the enhancer to be a function.'</span>)</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="comment">// 使用enhancer对createStore进行增强，enhancer 的具体执行功能见 applyMiddlerware</span></span><br><span class="line">    <span class="keyword">return</span> enhancer(createStore)(reducer, preloadedState)</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="comment">// balabalabala...</span></span><br><span class="line"></span><br><span class="line">  <span class="keyword">return</span> &#123;</span><br><span class="line">    dispatch,</span><br><span class="line">    subscribe,</span><br><span class="line">    getState,</span><br><span class="line">    replaceReducer,</span><br><span class="line">    [$$observable]: observable</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>然后我们再来看<em>applyMiddleware</em>的源码</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> compose <span class="keyword">from</span> <span class="string">'./compose'</span></span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Creates a store enhancer that applies middleware to the dispatch method            | 创建一个store增强函数，使得中间件可以在调度方法（dispatch）时运用</span></span><br><span class="line"><span class="comment"> * of the Redux store. This is handy for a variety of tasks, such as expressing       | 这对于种类多样的任务来说是很便利的，比如用简洁方式表达异步操作</span></span><br><span class="line"><span class="comment"> * asynchronous actions in a concise manner, or logging every action payload.         | 或者是打印每一个action的payload。</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * See `redux-thunk` package as an example of the Redux middleware.                   | redux-thunk 是一个很好的例子</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * Because middleware is potentially asynchronous, this should be the first           | 由于中间件很可能是异步的，因此它（thunk）应位于增强函数组合链的顶端</span></span><br><span class="line"><span class="comment"> * store enhancer in the composition chain.</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * Note that each middleware will be given the `dispatch` and `getState` functions    | 每一个中间件，都会在参数中被给予‘dispatch’和‘getState’这两个方法</span></span><br><span class="line"><span class="comment"> * as named arguments.                                                                | 中间件写法:       </span></span><br><span class="line"><span class="comment"> *                                                                                    | （dispatch,getState）=&gt; next =&gt; action =&gt; &#123;... return next(action)&#125;</span></span><br><span class="line"><span class="comment"> * @param &#123;...Function&#125; middlewares The middleware chain to be applied.               | 一堆中间件，中间件数组</span></span><br><span class="line"><span class="comment"> * @returns &#123;Function&#125; A store enhancer applying the middleware.                      | 返回一个呗中间件增强过的store</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="function"><span class="keyword">function</span> <span class="title">applyMiddleware</span>(<span class="params">...middlewares</span>) </span>&#123;</span><br><span class="line">  <span class="comment">// enhancer是这样调用的 -&gt; enhancer(createStore)(reducer, preloadedState)</span></span><br><span class="line">  <span class="keyword">return</span> <span class="function"><span class="params">createStore</span> =&gt;</span> (...args) =&gt; &#123;      <span class="comment">// args: [ reducer , preloadedState ]</span></span><br><span class="line">    <span class="keyword">const</span> store = createStore(...args)      <span class="comment">// 这里没有enhancer增强函数，就不会被阻止执行</span></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">      所以store大概长这样</span></span><br><span class="line"><span class="comment">      store = &#123;</span></span><br><span class="line"><span class="comment">        dispatch,</span></span><br><span class="line"><span class="comment">        subscribe,</span></span><br><span class="line"><span class="comment">        getState,</span></span><br><span class="line"><span class="comment">        replaceReducer,</span></span><br><span class="line"><span class="comment">        [$$observable]: observable</span></span><br><span class="line"><span class="comment">      &#125;</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="keyword">let</span> dispatch = <span class="function"><span class="params">()</span> =&gt;</span> &#123;</span><br><span class="line">      <span class="keyword">throw</span> <span class="keyword">new</span> <span class="built_in">Error</span>(</span><br><span class="line">        <span class="string">`Dispatching while constructing your middleware is not allowed. `</span> +</span><br><span class="line">          <span class="string">`Other middleware would not be applied to this dispatch.`</span></span><br><span class="line">      )</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="comment">// 大概就说在构建中间件期间dispatch是不允许的，其他中间件不会应用本次调度dispatch，就是dispatch了没用吧。</span></span><br><span class="line">    </span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * dispatch 函数定义</span></span><br><span class="line"><span class="comment">     * dispatch(action) &#123;</span></span><br><span class="line"><span class="comment">     *  ...</span></span><br><span class="line"><span class="comment">     *  currentState = currentReducer(currentState, action)</span></span><br><span class="line"><span class="comment">     *  return action </span></span><br><span class="line"><span class="comment">     *  ...</span></span><br><span class="line"><span class="comment">     * &#125;</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line"></span><br><span class="line">  </span><br><span class="line">    <span class="keyword">const</span> middlewareAPI = &#123;</span><br><span class="line">      getState: store.getState,</span><br><span class="line">      dispatch: <span class="function">(<span class="params">...args</span>) =&gt;</span> dispatch(...args)</span><br><span class="line">    &#125;</span><br><span class="line">    <span class="comment">// 中间写法： （dispatch,getState）=&gt; next =&gt; action =&gt; &#123;... return next(action)&#125;</span></span><br><span class="line">    <span class="comment">// 第一个参数里的两个方法就是这么来的！！！</span></span><br><span class="line">    <span class="keyword">const</span> chain = middlewares.map(<span class="function"><span class="params">middleware</span> =&gt;</span> middleware(middlewareAPI))</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * chain: [</span></span><br><span class="line"><span class="comment">     *  0: next =&gt; action =&gt; &#123;</span></span><br><span class="line"><span class="comment">     *      return next(action)</span></span><br><span class="line"><span class="comment">     *    &#125;,</span></span><br><span class="line"><span class="comment">     *  1: ....</span></span><br><span class="line"><span class="comment">     *  2: ....</span></span><br><span class="line"><span class="comment">     * ]</span></span><br><span class="line"><span class="comment">     * </span></span><br><span class="line"><span class="comment">     * // 最后一级的next是store.dispatch</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">// 读到这的时候，还是先读一下compose函数吧...</span></span><br><span class="line">    dispatch = compose(...chain)(store.dispatch)</span><br><span class="line"></span><br><span class="line">    <span class="comment">// 返回增强完毕的 Store  即 返回一个打完中间件的 Store</span></span><br><span class="line">    <span class="keyword">return</span> &#123;</span><br><span class="line">      ...store,</span><br><span class="line">      dispatch</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="compose-js-组合函数"><a href="#compose-js-组合函数" class="headerlink" title="compose.js 组合函数"></a>compose.js 组合函数</h3><p>这个函数仅仅几行代码，看了半天 T T ,只怪自己菜..</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Composes single-argument functions from right to left. The rightmost         | 从右到左组合单参数函数，最右边的函数</span></span><br><span class="line"><span class="comment"> * function can take multiple arguments as it provides the signature for        | 这句不知道怎么翻译 = =</span></span><br><span class="line"><span class="comment"> * the resulting composite function.                                            | 翻译说 最右边的函数可以采用多个参数，因为它为生成的复合函数提供了签名 ？？？</span></span><br><span class="line"><span class="comment"> *                                                                              | </span></span><br><span class="line"><span class="comment"> * @param &#123;...Function&#125; funcs The functions to compose.                         | 一堆函数，其实就是一堆中间件，说的再具体点是 next =&gt; action =&gt; &#123; ... &#125;</span></span><br><span class="line"><span class="comment"> * @returns &#123;Function&#125; A function obtained by composing the argument functions  | 返回一个函数，通过从右到左组合参数函数获得的函数。</span></span><br><span class="line"><span class="comment"> * from right to left. For example, compose(f, g, h) is identical to doing      | 例如，compose（f，g，h）与do（... args）=&gt; f（g（h（... args）））相同。</span></span><br><span class="line"><span class="comment"> * (...args) =&gt; f(g(h(...args))).</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> <span class="function"><span class="keyword">function</span> <span class="title">compose</span>(<span class="params">...funcs</span>) </span>&#123;</span><br><span class="line">  <span class="keyword">if</span> (funcs.length === <span class="number">0</span>) &#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="function"><span class="params">arg</span> =&gt;</span> arg</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">if</span> (funcs.length === <span class="number">1</span>) &#123;</span><br><span class="line">    <span class="keyword">return</span> funcs[<span class="number">0</span>]</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">return</span> funcs.reduce(<span class="function">(<span class="params">a, b</span>) =&gt;</span> (...args) =&gt; a(b(...args)))</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 调用示例 compose(...chain)(store.dispatch)</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> * chain = func</span></span><br><span class="line"><span class="comment"> * func:  next =&gt; actions =&gt; &#123;</span></span><br><span class="line"><span class="comment"> *            return next(action)</span></span><br><span class="line"><span class="comment"> *        &#125;</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> * ------------------------------------------</span></span><br><span class="line"><span class="comment"> * funcs.reduce( (pre, cur) =&gt; &#123;</span></span><br><span class="line"><span class="comment"> *  return (...args) =&gt; &#123;</span></span><br><span class="line"><span class="comment"> *    return pre(  cur( ...args )  )</span></span><br><span class="line"><span class="comment"> *  &#125;</span></span><br><span class="line"><span class="comment"> * &#125; )</span></span><br><span class="line"><span class="comment"> *  </span></span><br><span class="line"><span class="comment"> *  ------------------------------------------</span></span><br><span class="line"><span class="comment"> *  !!!! 再回去看那个dispatch吧</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * dispatch = compose(...chain)(store.dispatch)</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * compose(...chain) 换个形式看，如下：</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> *    (...args) =&gt; &#123;</span></span><br><span class="line"><span class="comment"> *      return n_func0 (  n_func1(  n_func2 (  ... n_funcEnd(...args)  ) ) )</span></span><br><span class="line"><span class="comment"> *    &#125; </span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> *     n_func 表示 next =&gt; action =&gt; &#123; ... &#125;</span></span><br><span class="line"><span class="comment"> *     args 是 store.dispatch</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * 一般 n_funcEnd 都一执行 next(action) 这就是 dispatch(action)</span></span><br><span class="line"><span class="comment"> </span></span><br><span class="line"><span class="comment"> * n_funcEnd大概长这样：</span></span><br><span class="line"><span class="comment"> * store.dispatch =&gt; action =&gt; &#123;  return store.dispatch(action)  &#125; </span></span><br><span class="line"><span class="comment"> *   </span></span><br><span class="line"><span class="comment"> * n_funcEnd执行完返回 action =&gt; &#123;  return store.dispatch(action)  &#125; 函数 即（funcEnd）</span></span><br><span class="line"><span class="comment"> * n_funcEnd-1 那大概长这样：</span></span><br><span class="line"><span class="comment"> * funcEnd =&gt; action =&gt; &#123; ... &#125;</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> * (...经过一系列执行之后)</span></span><br><span class="line"><span class="comment"> *  func1 =&gt; action =&gt; &#123; ... &#125;   执行完后 </span></span><br><span class="line"><span class="comment"> *  留下一个 func0</span></span><br><span class="line"><span class="comment"> *  func0大概长这样 ：</span></span><br><span class="line"><span class="comment"> *  action =&gt; &#123;</span></span><br><span class="line"><span class="comment"> *    ...</span></span><br><span class="line"><span class="comment"> *    next(action)  &lt;--- 这样就会执行 func1(action)啦，开始从左往右传递执行</span></span><br><span class="line"><span class="comment"> *  &#125;</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> */</span></span><br></pre></td></tr></table></figure>
<p>所以, 在组合中间件的时候，是从右往左组合，而当传递action时，是从左往右传递</p>
<p>不过在这个传递的过程中，对于每一个中间件的编写都有一个规范约束,(即，都要执行一下next(action)), 以保证funcEnd能拿到action最后执行dispatch(action)</p>
<p>中间夹杂异步操作的话，只需要在异步结果返回的时候，处理好action并调用next(action)，让action继续传递下去就OK。</p>

      

      
    </div>
    <div class="article-info article-info-index">
      
      
	<div class="article-tag tagcloud">
		<i class="icon-price-tags icon"></i>
		<ul class="article-tag-list">
			 
        		<li class="article-tag-list-item">
        			<a href="javascript:void(0)" class="js-tag article-tag-list-link color1">Redux</a>
        		</li>
      		
		</ul>
	</div>

      

      
        <p class="article-more-link">
          <a class="article-more-a" href="/2019/05/07/Redux-源码解读-三/">展开全文 >></a>
        </p>
      

      
      <div class="clearfix"></div>
    </div>
  </div>
</article>

<aside class="wrap-side-operation">
    <div class="mod-side-operation">
        
        <div class="jump-container" id="js-jump-container" style="display:none;">
            <a href="javascript:void(0)" class="mod-side-operation__jump-to-top">
                <i class="icon-font icon-back"></i>
            </a>
            <div id="js-jump-plan-container" class="jump-plan-container" style="top: -11px;">
                <i class="icon-font icon-plane jump-plane"></i>
            </div>
        </div>
        
        
    </div>
</aside>




  
  
    <nav id="page-nav">
      <span class="page-number current">1</span><a class="page-number" href="/page/2/">2</a><a class="page-number" href="/page/3/">3</a><span class="space">&hellip;</span><a class="page-number" href="/page/5/">5</a><a class="extend next" rel="next" href="/page/2/">Next &raquo;</a>
    </nav>
  


          </div>
        </div>
      </div>
      <footer id="footer">
  <div class="outer">
    <div id="footer-info">
    	<div class="footer-left">
    		&copy; 2019 Serebii
    	</div>
      	<div class="footer-right">
      		<a href="http://hexo.io/" target="_blank">Hexo</a>  Theme <a href="https://github.com/litten/hexo-theme-yilia" target="_blank">Yilia</a> by Litten
      	</div>
    </div>
  </div>
</footer>
    </div>
    <script>
	var yiliaConfig = {
		mathjax: false,
		isHome: true,
		isPost: false,
		isArchive: false,
		isTag: false,
		isCategory: false,
		open_in_new: false,
		toc_hide_index: true,
		root: "/",
		innerArchive: true,
		showTags: true
	}
</script>

<script>!function(t){function n(e){if(r[e])return r[e].exports;var i=r[e]={exports:{},id:e,loaded:!1};return t[e].call(i.exports,i,i.exports,n),i.loaded=!0,i.exports}var r={};n.m=t,n.c=r,n.p="./",n(0)}([function(t,n,r){r(195),t.exports=r(191)},function(t,n,r){var e=r(3),i=r(52),o=r(27),u=r(28),c=r(53),f="prototype",a=function(t,n,r){var s,l,h,v,p=t&a.F,d=t&a.G,y=t&a.S,g=t&a.P,b=t&a.B,m=d?e:y?e[n]||(e[n]={}):(e[n]||{})[f],x=d?i:i[n]||(i[n]={}),w=x[f]||(x[f]={});d&&(r=n);for(s in r)l=!p&&m&&void 0!==m[s],h=(l?m:r)[s],v=b&&l?c(h,e):g&&"function"==typeof h?c(Function.call,h):h,m&&u(m,s,h,t&a.U),x[s]!=h&&o(x,s,v),g&&w[s]!=h&&(w[s]=h)};e.core=i,a.F=1,a.G=2,a.S=4,a.P=8,a.B=16,a.W=32,a.U=64,a.R=128,t.exports=a},function(t,n,r){var e=r(6);t.exports=function(t){if(!e(t))throw TypeError(t+" is not an object!");return t}},function(t,n){var r=t.exports="undefined"!=typeof window&&window.Math==Math?window:"undefined"!=typeof self&&self.Math==Math?self:Function("return this")();"number"==typeof __g&&(__g=r)},function(t,n){t.exports=function(t){try{return!!t()}catch(t){return!0}}},function(t,n){var r=t.exports="undefined"!=typeof window&&window.Math==Math?window:"undefined"!=typeof self&&self.Math==Math?self:Function("return this")();"number"==typeof __g&&(__g=r)},function(t,n){t.exports=function(t){return"object"==typeof t?null!==t:"function"==typeof t}},function(t,n,r){var e=r(126)("wks"),i=r(76),o=r(3).Symbol,u="function"==typeof o;(t.exports=function(t){return e[t]||(e[t]=u&&o[t]||(u?o:i)("Symbol."+t))}).store=e},function(t,n){var r={}.hasOwnProperty;t.exports=function(t,n){return r.call(t,n)}},function(t,n,r){var e=r(94),i=r(33);t.exports=function(t){return e(i(t))}},function(t,n,r){t.exports=!r(4)(function(){return 7!=Object.defineProperty({},"a",{get:function(){return 7}}).a})},function(t,n,r){var e=r(2),i=r(167),o=r(50),u=Object.defineProperty;n.f=r(10)?Object.defineProperty:function(t,n,r){if(e(t),n=o(n,!0),e(r),i)try{return u(t,n,r)}catch(t){}if("get"in r||"set"in r)throw TypeError("Accessors not supported!");return"value"in r&&(t[n]=r.value),t}},function(t,n,r){t.exports=!r(18)(function(){return 7!=Object.defineProperty({},"a",{get:function(){return 7}}).a})},function(t,n,r){var e=r(14),i=r(22);t.exports=r(12)?function(t,n,r){return e.f(t,n,i(1,r))}:function(t,n,r){return t[n]=r,t}},function(t,n,r){var e=r(20),i=r(58),o=r(42),u=Object.defineProperty;n.f=r(12)?Object.defineProperty:function(t,n,r){if(e(t),n=o(n,!0),e(r),i)try{return u(t,n,r)}catch(t){}if("get"in r||"set"in r)throw TypeError("Accessors not supported!");return"value"in r&&(t[n]=r.value),t}},function(t,n,r){var e=r(40)("wks"),i=r(23),o=r(5).Symbol,u="function"==typeof o;(t.exports=function(t){return e[t]||(e[t]=u&&o[t]||(u?o:i)("Symbol."+t))}).store=e},function(t,n,r){var e=r(67),i=Math.min;t.exports=function(t){return t>0?i(e(t),9007199254740991):0}},function(t,n,r){var e=r(46);t.exports=function(t){return Object(e(t))}},function(t,n){t.exports=function(t){try{return!!t()}catch(t){return!0}}},function(t,n,r){var e=r(63),i=r(34);t.exports=Object.keys||function(t){return e(t,i)}},function(t,n,r){var e=r(21);t.exports=function(t){if(!e(t))throw TypeError(t+" is not an object!");return t}},function(t,n){t.exports=function(t){return"object"==typeof t?null!==t:"function"==typeof t}},function(t,n){t.exports=function(t,n){return{enumerable:!(1&t),configurable:!(2&t),writable:!(4&t),value:n}}},function(t,n){var r=0,e=Math.random();t.exports=function(t){return"Symbol(".concat(void 0===t?"":t,")_",(++r+e).toString(36))}},function(t,n){var r={}.hasOwnProperty;t.exports=function(t,n){return r.call(t,n)}},function(t,n){var r=t.exports={version:"2.4.0"};"number"==typeof __e&&(__e=r)},function(t,n){t.exports=function(t){if("function"!=typeof t)throw TypeError(t+" is not a function!");return t}},function(t,n,r){var e=r(11),i=r(66);t.exports=r(10)?function(t,n,r){return e.f(t,n,i(1,r))}:function(t,n,r){return t[n]=r,t}},function(t,n,r){var e=r(3),i=r(27),o=r(24),u=r(76)("src"),c="toString",f=Function[c],a=(""+f).split(c);r(52).inspectSource=function(t){return f.call(t)},(t.exports=function(t,n,r,c){var f="function"==typeof r;f&&(o(r,"name")||i(r,"name",n)),t[n]!==r&&(f&&(o(r,u)||i(r,u,t[n]?""+t[n]:a.join(String(n)))),t===e?t[n]=r:c?t[n]?t[n]=r:i(t,n,r):(delete t[n],i(t,n,r)))})(Function.prototype,c,function(){return"function"==typeof this&&this[u]||f.call(this)})},function(t,n,r){var e=r(1),i=r(4),o=r(46),u=function(t,n,r,e){var i=String(o(t)),u="<"+n;return""!==r&&(u+=" "+r+'="'+String(e).replace(/"/g,"&quot;")+'"'),u+">"+i+"</"+n+">"};t.exports=function(t,n){var r={};r[t]=n(u),e(e.P+e.F*i(function(){var n=""[t]('"');return n!==n.toLowerCase()||n.split('"').length>3}),"String",r)}},function(t,n,r){var e=r(115),i=r(46);t.exports=function(t){return e(i(t))}},function(t,n,r){var e=r(116),i=r(66),o=r(30),u=r(50),c=r(24),f=r(167),a=Object.getOwnPropertyDescriptor;n.f=r(10)?a:function(t,n){if(t=o(t),n=u(n,!0),f)try{return a(t,n)}catch(t){}if(c(t,n))return i(!e.f.call(t,n),t[n])}},function(t,n,r){var e=r(24),i=r(17),o=r(145)("IE_PROTO"),u=Object.prototype;t.exports=Object.getPrototypeOf||function(t){return t=i(t),e(t,o)?t[o]:"function"==typeof t.constructor&&t instanceof t.constructor?t.constructor.prototype:t instanceof Object?u:null}},function(t,n){t.exports=function(t){if(void 0==t)throw TypeError("Can't call method on  "+t);return t}},function(t,n){t.exports="constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf".split(",")},function(t,n){t.exports={}},function(t,n){t.exports=!0},function(t,n){n.f={}.propertyIsEnumerable},function(t,n,r){var e=r(14).f,i=r(8),o=r(15)("toStringTag");t.exports=function(t,n,r){t&&!i(t=r?t:t.prototype,o)&&e(t,o,{configurable:!0,value:n})}},function(t,n,r){var e=r(40)("keys"),i=r(23);t.exports=function(t){return e[t]||(e[t]=i(t))}},function(t,n,r){var e=r(5),i="__core-js_shared__",o=e[i]||(e[i]={});t.exports=function(t){return o[t]||(o[t]={})}},function(t,n){var r=Math.ceil,e=Math.floor;t.exports=function(t){return isNaN(t=+t)?0:(t>0?e:r)(t)}},function(t,n,r){var e=r(21);t.exports=function(t,n){if(!e(t))return t;var r,i;if(n&&"function"==typeof(r=t.toString)&&!e(i=r.call(t)))return i;if("function"==typeof(r=t.valueOf)&&!e(i=r.call(t)))return i;if(!n&&"function"==typeof(r=t.toString)&&!e(i=r.call(t)))return i;throw TypeError("Can't convert object to primitive value")}},function(t,n,r){var e=r(5),i=r(25),o=r(36),u=r(44),c=r(14).f;t.exports=function(t){var n=i.Symbol||(i.Symbol=o?{}:e.Symbol||{});"_"==t.charAt(0)||t in n||c(n,t,{value:u.f(t)})}},function(t,n,r){n.f=r(15)},function(t,n){var r={}.toString;t.exports=function(t){return r.call(t).slice(8,-1)}},function(t,n){t.exports=function(t){if(void 0==t)throw TypeError("Can't call method on  "+t);return t}},function(t,n,r){var e=r(4);t.exports=function(t,n){return!!t&&e(function(){n?t.call(null,function(){},1):t.call(null)})}},function(t,n,r){var e=r(53),i=r(115),o=r(17),u=r(16),c=r(203);t.exports=function(t,n){var r=1==t,f=2==t,a=3==t,s=4==t,l=6==t,h=5==t||l,v=n||c;return function(n,c,p){for(var d,y,g=o(n),b=i(g),m=e(c,p,3),x=u(b.length),w=0,S=r?v(n,x):f?v(n,0):void 0;x>w;w++)if((h||w in b)&&(d=b[w],y=m(d,w,g),t))if(r)S[w]=y;else if(y)switch(t){case 3:return!0;case 5:return d;case 6:return w;case 2:S.push(d)}else if(s)return!1;return l?-1:a||s?s:S}}},function(t,n,r){var e=r(1),i=r(52),o=r(4);t.exports=function(t,n){var r=(i.Object||{})[t]||Object[t],u={};u[t]=n(r),e(e.S+e.F*o(function(){r(1)}),"Object",u)}},function(t,n,r){var e=r(6);t.exports=function(t,n){if(!e(t))return t;var r,i;if(n&&"function"==typeof(r=t.toString)&&!e(i=r.call(t)))return i;if("function"==typeof(r=t.valueOf)&&!e(i=r.call(t)))return i;if(!n&&"function"==typeof(r=t.toString)&&!e(i=r.call(t)))return i;throw TypeError("Can't convert object to primitive value")}},function(t,n,r){var e=r(5),i=r(25),o=r(91),u=r(13),c="prototype",f=function(t,n,r){var a,s,l,h=t&f.F,v=t&f.G,p=t&f.S,d=t&f.P,y=t&f.B,g=t&f.W,b=v?i:i[n]||(i[n]={}),m=b[c],x=v?e:p?e[n]:(e[n]||{})[c];v&&(r=n);for(a in r)(s=!h&&x&&void 0!==x[a])&&a in b||(l=s?x[a]:r[a],b[a]=v&&"function"!=typeof x[a]?r[a]:y&&s?o(l,e):g&&x[a]==l?function(t){var n=function(n,r,e){if(this instanceof t){switch(arguments.length){case 0:return new t;case 1:return new t(n);case 2:return new t(n,r)}return new t(n,r,e)}return t.apply(this,arguments)};return n[c]=t[c],n}(l):d&&"function"==typeof l?o(Function.call,l):l,d&&((b.virtual||(b.virtual={}))[a]=l,t&f.R&&m&&!m[a]&&u(m,a,l)))};f.F=1,f.G=2,f.S=4,f.P=8,f.B=16,f.W=32,f.U=64,f.R=128,t.exports=f},function(t,n){var r=t.exports={version:"2.4.0"};"number"==typeof __e&&(__e=r)},function(t,n,r){var e=r(26);t.exports=function(t,n,r){if(e(t),void 0===n)return t;switch(r){case 1:return function(r){return t.call(n,r)};case 2:return function(r,e){return t.call(n,r,e)};case 3:return function(r,e,i){return t.call(n,r,e,i)}}return function(){return t.apply(n,arguments)}}},function(t,n,r){var e=r(183),i=r(1),o=r(126)("metadata"),u=o.store||(o.store=new(r(186))),c=function(t,n,r){var i=u.get(t);if(!i){if(!r)return;u.set(t,i=new e)}var o=i.get(n);if(!o){if(!r)return;i.set(n,o=new e)}return o},f=function(t,n,r){var e=c(n,r,!1);return void 0!==e&&e.has(t)},a=function(t,n,r){var e=c(n,r,!1);return void 0===e?void 0:e.get(t)},s=function(t,n,r,e){c(r,e,!0).set(t,n)},l=function(t,n){var r=c(t,n,!1),e=[];return r&&r.forEach(function(t,n){e.push(n)}),e},h=function(t){return void 0===t||"symbol"==typeof t?t:String(t)},v=function(t){i(i.S,"Reflect",t)};t.exports={store:u,map:c,has:f,get:a,set:s,keys:l,key:h,exp:v}},function(t,n,r){"use strict";if(r(10)){var e=r(69),i=r(3),o=r(4),u=r(1),c=r(127),f=r(152),a=r(53),s=r(68),l=r(66),h=r(27),v=r(73),p=r(67),d=r(16),y=r(75),g=r(50),b=r(24),m=r(180),x=r(114),w=r(6),S=r(17),_=r(137),O=r(70),E=r(32),P=r(71).f,j=r(154),F=r(76),M=r(7),A=r(48),N=r(117),T=r(146),I=r(155),k=r(80),L=r(123),R=r(74),C=r(130),D=r(160),U=r(11),W=r(31),G=U.f,B=W.f,V=i.RangeError,z=i.TypeError,q=i.Uint8Array,K="ArrayBuffer",J="Shared"+K,Y="BYTES_PER_ELEMENT",H="prototype",$=Array[H],X=f.ArrayBuffer,Q=f.DataView,Z=A(0),tt=A(2),nt=A(3),rt=A(4),et=A(5),it=A(6),ot=N(!0),ut=N(!1),ct=I.values,ft=I.keys,at=I.entries,st=$.lastIndexOf,lt=$.reduce,ht=$.reduceRight,vt=$.join,pt=$.sort,dt=$.slice,yt=$.toString,gt=$.toLocaleString,bt=M("iterator"),mt=M("toStringTag"),xt=F("typed_constructor"),wt=F("def_constructor"),St=c.CONSTR,_t=c.TYPED,Ot=c.VIEW,Et="Wrong length!",Pt=A(1,function(t,n){return Tt(T(t,t[wt]),n)}),jt=o(function(){return 1===new q(new Uint16Array([1]).buffer)[0]}),Ft=!!q&&!!q[H].set&&o(function(){new q(1).set({})}),Mt=function(t,n){if(void 0===t)throw z(Et);var r=+t,e=d(t);if(n&&!m(r,e))throw V(Et);return e},At=function(t,n){var r=p(t);if(r<0||r%n)throw V("Wrong offset!");return r},Nt=function(t){if(w(t)&&_t in t)return t;throw z(t+" is not a typed array!")},Tt=function(t,n){if(!(w(t)&&xt in t))throw z("It is not a typed array constructor!");return new t(n)},It=function(t,n){return kt(T(t,t[wt]),n)},kt=function(t,n){for(var r=0,e=n.length,i=Tt(t,e);e>r;)i[r]=n[r++];return i},Lt=function(t,n,r){G(t,n,{get:function(){return this._d[r]}})},Rt=function(t){var n,r,e,i,o,u,c=S(t),f=arguments.length,s=f>1?arguments[1]:void 0,l=void 0!==s,h=j(c);if(void 0!=h&&!_(h)){for(u=h.call(c),e=[],n=0;!(o=u.next()).done;n++)e.push(o.value);c=e}for(l&&f>2&&(s=a(s,arguments[2],2)),n=0,r=d(c.length),i=Tt(this,r);r>n;n++)i[n]=l?s(c[n],n):c[n];return i},Ct=function(){for(var t=0,n=arguments.length,r=Tt(this,n);n>t;)r[t]=arguments[t++];return r},Dt=!!q&&o(function(){gt.call(new q(1))}),Ut=function(){return gt.apply(Dt?dt.call(Nt(this)):Nt(this),arguments)},Wt={copyWithin:function(t,n){return D.call(Nt(this),t,n,arguments.length>2?arguments[2]:void 0)},every:function(t){return rt(Nt(this),t,arguments.length>1?arguments[1]:void 0)},fill:function(t){return C.apply(Nt(this),arguments)},filter:function(t){return It(this,tt(Nt(this),t,arguments.length>1?arguments[1]:void 0))},find:function(t){return et(Nt(this),t,arguments.length>1?arguments[1]:void 0)},findIndex:function(t){return it(Nt(this),t,arguments.length>1?arguments[1]:void 0)},forEach:function(t){Z(Nt(this),t,arguments.length>1?arguments[1]:void 0)},indexOf:function(t){return ut(Nt(this),t,arguments.length>1?arguments[1]:void 0)},includes:function(t){return ot(Nt(this),t,arguments.length>1?arguments[1]:void 0)},join:function(t){return vt.apply(Nt(this),arguments)},lastIndexOf:function(t){return st.apply(Nt(this),arguments)},map:function(t){return Pt(Nt(this),t,arguments.length>1?arguments[1]:void 0)},reduce:function(t){return lt.apply(Nt(this),arguments)},reduceRight:function(t){return ht.apply(Nt(this),arguments)},reverse:function(){for(var t,n=this,r=Nt(n).length,e=Math.floor(r/2),i=0;i<e;)t=n[i],n[i++]=n[--r],n[r]=t;return n},some:function(t){return nt(Nt(this),t,arguments.length>1?arguments[1]:void 0)},sort:function(t){return pt.call(Nt(this),t)},subarray:function(t,n){var r=Nt(this),e=r.length,i=y(t,e);return new(T(r,r[wt]))(r.buffer,r.byteOffset+i*r.BYTES_PER_ELEMENT,d((void 0===n?e:y(n,e))-i))}},Gt=function(t,n){return It(this,dt.call(Nt(this),t,n))},Bt=function(t){Nt(this);var n=At(arguments[1],1),r=this.length,e=S(t),i=d(e.length),o=0;if(i+n>r)throw V(Et);for(;o<i;)this[n+o]=e[o++]},Vt={entries:function(){return at.call(Nt(this))},keys:function(){return ft.call(Nt(this))},values:function(){return ct.call(Nt(this))}},zt=function(t,n){return w(t)&&t[_t]&&"symbol"!=typeof n&&n in t&&String(+n)==String(n)},qt=function(t,n){return zt(t,n=g(n,!0))?l(2,t[n]):B(t,n)},Kt=function(t,n,r){return!(zt(t,n=g(n,!0))&&w(r)&&b(r,"value"))||b(r,"get")||b(r,"set")||r.configurable||b(r,"writable")&&!r.writable||b(r,"enumerable")&&!r.enumerable?G(t,n,r):(t[n]=r.value,t)};St||(W.f=qt,U.f=Kt),u(u.S+u.F*!St,"Object",{getOwnPropertyDescriptor:qt,defineProperty:Kt}),o(function(){yt.call({})})&&(yt=gt=function(){return vt.call(this)});var Jt=v({},Wt);v(Jt,Vt),h(Jt,bt,Vt.values),v(Jt,{slice:Gt,set:Bt,constructor:function(){},toString:yt,toLocaleString:Ut}),Lt(Jt,"buffer","b"),Lt(Jt,"byteOffset","o"),Lt(Jt,"byteLength","l"),Lt(Jt,"length","e"),G(Jt,mt,{get:function(){return this[_t]}}),t.exports=function(t,n,r,f){f=!!f;var a=t+(f?"Clamped":"")+"Array",l="Uint8Array"!=a,v="get"+t,p="set"+t,y=i[a],g=y||{},b=y&&E(y),m=!y||!c.ABV,S={},_=y&&y[H],j=function(t,r){var e=t._d;return e.v[v](r*n+e.o,jt)},F=function(t,r,e){var i=t._d;f&&(e=(e=Math.round(e))<0?0:e>255?255:255&e),i.v[p](r*n+i.o,e,jt)},M=function(t,n){G(t,n,{get:function(){return j(this,n)},set:function(t){return F(this,n,t)},enumerable:!0})};m?(y=r(function(t,r,e,i){s(t,y,a,"_d");var o,u,c,f,l=0,v=0;if(w(r)){if(!(r instanceof X||(f=x(r))==K||f==J))return _t in r?kt(y,r):Rt.call(y,r);o=r,v=At(e,n);var p=r.byteLength;if(void 0===i){if(p%n)throw V(Et);if((u=p-v)<0)throw V(Et)}else if((u=d(i)*n)+v>p)throw V(Et);c=u/n}else c=Mt(r,!0),u=c*n,o=new X(u);for(h(t,"_d",{b:o,o:v,l:u,e:c,v:new Q(o)});l<c;)M(t,l++)}),_=y[H]=O(Jt),h(_,"constructor",y)):L(function(t){new y(null),new y(t)},!0)||(y=r(function(t,r,e,i){s(t,y,a);var o;return w(r)?r instanceof X||(o=x(r))==K||o==J?void 0!==i?new g(r,At(e,n),i):void 0!==e?new g(r,At(e,n)):new g(r):_t in r?kt(y,r):Rt.call(y,r):new g(Mt(r,l))}),Z(b!==Function.prototype?P(g).concat(P(b)):P(g),function(t){t in y||h(y,t,g[t])}),y[H]=_,e||(_.constructor=y));var A=_[bt],N=!!A&&("values"==A.name||void 0==A.name),T=Vt.values;h(y,xt,!0),h(_,_t,a),h(_,Ot,!0),h(_,wt,y),(f?new y(1)[mt]==a:mt in _)||G(_,mt,{get:function(){return a}}),S[a]=y,u(u.G+u.W+u.F*(y!=g),S),u(u.S,a,{BYTES_PER_ELEMENT:n,from:Rt,of:Ct}),Y in _||h(_,Y,n),u(u.P,a,Wt),R(a),u(u.P+u.F*Ft,a,{set:Bt}),u(u.P+u.F*!N,a,Vt),u(u.P+u.F*(_.toString!=yt),a,{toString:yt}),u(u.P+u.F*o(function(){new y(1).slice()}),a,{slice:Gt}),u(u.P+u.F*(o(function(){return[1,2].toLocaleString()!=new y([1,2]).toLocaleString()})||!o(function(){_.toLocaleString.call([1,2])})),a,{toLocaleString:Ut}),k[a]=N?A:T,e||N||h(_,bt,T)}}else t.exports=function(){}},function(t,n){var r={}.toString;t.exports=function(t){return r.call(t).slice(8,-1)}},function(t,n,r){var e=r(21),i=r(5).document,o=e(i)&&e(i.createElement);t.exports=function(t){return o?i.createElement(t):{}}},function(t,n,r){t.exports=!r(12)&&!r(18)(function(){return 7!=Object.defineProperty(r(57)("div"),"a",{get:function(){return 7}}).a})},function(t,n,r){"use strict";var e=r(36),i=r(51),o=r(64),u=r(13),c=r(8),f=r(35),a=r(96),s=r(38),l=r(103),h=r(15)("iterator"),v=!([].keys&&"next"in[].keys()),p="keys",d="values",y=function(){return this};t.exports=function(t,n,r,g,b,m,x){a(r,n,g);var w,S,_,O=function(t){if(!v&&t in F)return F[t];switch(t){case p:case d:return function(){return new r(this,t)}}return function(){return new r(this,t)}},E=n+" Iterator",P=b==d,j=!1,F=t.prototype,M=F[h]||F["@@iterator"]||b&&F[b],A=M||O(b),N=b?P?O("entries"):A:void 0,T="Array"==n?F.entries||M:M;if(T&&(_=l(T.call(new t)))!==Object.prototype&&(s(_,E,!0),e||c(_,h)||u(_,h,y)),P&&M&&M.name!==d&&(j=!0,A=function(){return M.call(this)}),e&&!x||!v&&!j&&F[h]||u(F,h,A),f[n]=A,f[E]=y,b)if(w={values:P?A:O(d),keys:m?A:O(p),entries:N},x)for(S in w)S in F||o(F,S,w[S]);else i(i.P+i.F*(v||j),n,w);return w}},function(t,n,r){var e=r(20),i=r(100),o=r(34),u=r(39)("IE_PROTO"),c=function(){},f="prototype",a=function(){var t,n=r(57)("iframe"),e=o.length;for(n.style.display="none",r(93).appendChild(n),n.src="javascript:",t=n.contentWindow.document,t.open(),t.write("<script>document.F=Object<\/script>"),t.close(),a=t.F;e--;)delete a[f][o[e]];return a()};t.exports=Object.create||function(t,n){var r;return null!==t?(c[f]=e(t),r=new c,c[f]=null,r[u]=t):r=a(),void 0===n?r:i(r,n)}},function(t,n,r){var e=r(63),i=r(34).concat("length","prototype");n.f=Object.getOwnPropertyNames||function(t){return e(t,i)}},function(t,n){n.f=Object.getOwnPropertySymbols},function(t,n,r){var e=r(8),i=r(9),o=r(90)(!1),u=r(39)("IE_PROTO");t.exports=function(t,n){var r,c=i(t),f=0,a=[];for(r in c)r!=u&&e(c,r)&&a.push(r);for(;n.length>f;)e(c,r=n[f++])&&(~o(a,r)||a.push(r));return a}},function(t,n,r){t.exports=r(13)},function(t,n,r){var e=r(76)("meta"),i=r(6),o=r(24),u=r(11).f,c=0,f=Object.isExtensible||function(){return!0},a=!r(4)(function(){return f(Object.preventExtensions({}))}),s=function(t){u(t,e,{value:{i:"O"+ ++c,w:{}}})},l=function(t,n){if(!i(t))return"symbol"==typeof t?t:("string"==typeof t?"S":"P")+t;if(!o(t,e)){if(!f(t))return"F";if(!n)return"E";s(t)}return t[e].i},h=function(t,n){if(!o(t,e)){if(!f(t))return!0;if(!n)return!1;s(t)}return t[e].w},v=function(t){return a&&p.NEED&&f(t)&&!o(t,e)&&s(t),t},p=t.exports={KEY:e,NEED:!1,fastKey:l,getWeak:h,onFreeze:v}},function(t,n){t.exports=function(t,n){return{enumerable:!(1&t),configurable:!(2&t),writable:!(4&t),value:n}}},function(t,n){var r=Math.ceil,e=Math.floor;t.exports=function(t){return isNaN(t=+t)?0:(t>0?e:r)(t)}},function(t,n){t.exports=function(t,n,r,e){if(!(t instanceof n)||void 0!==e&&e in t)throw TypeError(r+": incorrect invocation!");return t}},function(t,n){t.exports=!1},function(t,n,r){var e=r(2),i=r(173),o=r(133),u=r(145)("IE_PROTO"),c=function(){},f="prototype",a=function(){var t,n=r(132)("iframe"),e=o.length;for(n.style.display="none",r(135).appendChild(n),n.src="javascript:",t=n.contentWindow.document,t.open(),t.write("<script>document.F=Object<\/script>"),t.close(),a=t.F;e--;)delete a[f][o[e]];return a()};t.exports=Object.create||function(t,n){var r;return null!==t?(c[f]=e(t),r=new c,c[f]=null,r[u]=t):r=a(),void 0===n?r:i(r,n)}},function(t,n,r){var e=r(175),i=r(133).concat("length","prototype");n.f=Object.getOwnPropertyNames||function(t){return e(t,i)}},function(t,n,r){var e=r(175),i=r(133);t.exports=Object.keys||function(t){return e(t,i)}},function(t,n,r){var e=r(28);t.exports=function(t,n,r){for(var i in n)e(t,i,n[i],r);return t}},function(t,n,r){"use strict";var e=r(3),i=r(11),o=r(10),u=r(7)("species");t.exports=function(t){var n=e[t];o&&n&&!n[u]&&i.f(n,u,{configurable:!0,get:function(){return this}})}},function(t,n,r){var e=r(67),i=Math.max,o=Math.min;t.exports=function(t,n){return t=e(t),t<0?i(t+n,0):o(t,n)}},function(t,n){var r=0,e=Math.random();t.exports=function(t){return"Symbol(".concat(void 0===t?"":t,")_",(++r+e).toString(36))}},function(t,n,r){var e=r(33);t.exports=function(t){return Object(e(t))}},function(t,n,r){var e=r(7)("unscopables"),i=Array.prototype;void 0==i[e]&&r(27)(i,e,{}),t.exports=function(t){i[e][t]=!0}},function(t,n,r){var e=r(53),i=r(169),o=r(137),u=r(2),c=r(16),f=r(154),a={},s={},n=t.exports=function(t,n,r,l,h){var v,p,d,y,g=h?function(){return t}:f(t),b=e(r,l,n?2:1),m=0;if("function"!=typeof g)throw TypeError(t+" is not iterable!");if(o(g)){for(v=c(t.length);v>m;m++)if((y=n?b(u(p=t[m])[0],p[1]):b(t[m]))===a||y===s)return y}else for(d=g.call(t);!(p=d.next()).done;)if((y=i(d,b,p.value,n))===a||y===s)return y};n.BREAK=a,n.RETURN=s},function(t,n){t.exports={}},function(t,n,r){var e=r(11).f,i=r(24),o=r(7)("toStringTag");t.exports=function(t,n,r){t&&!i(t=r?t:t.prototype,o)&&e(t,o,{configurable:!0,value:n})}},function(t,n,r){var e=r(1),i=r(46),o=r(4),u=r(150),c="["+u+"]",f="​",a=RegExp("^"+c+c+"*"),s=RegExp(c+c+"*$"),l=function(t,n,r){var i={},c=o(function(){return!!u[t]()||f[t]()!=f}),a=i[t]=c?n(h):u[t];r&&(i[r]=a),e(e.P+e.F*c,"String",i)},h=l.trim=function(t,n){return t=String(i(t)),1&n&&(t=t.replace(a,"")),2&n&&(t=t.replace(s,"")),t};t.exports=l},function(t,n,r){t.exports={default:r(86),__esModule:!0}},function(t,n,r){t.exports={default:r(87),__esModule:!0}},function(t,n,r){"use strict";function e(t){return t&&t.__esModule?t:{default:t}}n.__esModule=!0;var i=r(84),o=e(i),u=r(83),c=e(u),f="function"==typeof c.default&&"symbol"==typeof o.default?function(t){return typeof t}:function(t){return t&&"function"==typeof c.default&&t.constructor===c.default&&t!==c.default.prototype?"symbol":typeof t};n.default="function"==typeof c.default&&"symbol"===f(o.default)?function(t){return void 0===t?"undefined":f(t)}:function(t){return t&&"function"==typeof c.default&&t.constructor===c.default&&t!==c.default.prototype?"symbol":void 0===t?"undefined":f(t)}},function(t,n,r){r(110),r(108),r(111),r(112),t.exports=r(25).Symbol},function(t,n,r){r(109),r(113),t.exports=r(44).f("iterator")},function(t,n){t.exports=function(t){if("function"!=typeof t)throw TypeError(t+" is not a function!");return t}},function(t,n){t.exports=function(){}},function(t,n,r){var e=r(9),i=r(106),o=r(105);t.exports=function(t){return function(n,r,u){var c,f=e(n),a=i(f.length),s=o(u,a);if(t&&r!=r){for(;a>s;)if((c=f[s++])!=c)return!0}else for(;a>s;s++)if((t||s in f)&&f[s]===r)return t||s||0;return!t&&-1}}},function(t,n,r){var e=r(88);t.exports=function(t,n,r){if(e(t),void 0===n)return t;switch(r){case 1:return function(r){return t.call(n,r)};case 2:return function(r,e){return t.call(n,r,e)};case 3:return function(r,e,i){return t.call(n,r,e,i)}}return function(){return t.apply(n,arguments)}}},function(t,n,r){var e=r(19),i=r(62),o=r(37);t.exports=function(t){var n=e(t),r=i.f;if(r)for(var u,c=r(t),f=o.f,a=0;c.length>a;)f.call(t,u=c[a++])&&n.push(u);return n}},function(t,n,r){t.exports=r(5).document&&document.documentElement},function(t,n,r){var e=r(56);t.exports=Object("z").propertyIsEnumerable(0)?Object:function(t){return"String"==e(t)?t.split(""):Object(t)}},function(t,n,r){var e=r(56);t.exports=Array.isArray||function(t){return"Array"==e(t)}},function(t,n,r){"use strict";var e=r(60),i=r(22),o=r(38),u={};r(13)(u,r(15)("iterator"),function(){return this}),t.exports=function(t,n,r){t.prototype=e(u,{next:i(1,r)}),o(t,n+" Iterator")}},function(t,n){t.exports=function(t,n){return{value:n,done:!!t}}},function(t,n,r){var e=r(19),i=r(9);t.exports=function(t,n){for(var r,o=i(t),u=e(o),c=u.length,f=0;c>f;)if(o[r=u[f++]]===n)return r}},function(t,n,r){var e=r(23)("meta"),i=r(21),o=r(8),u=r(14).f,c=0,f=Object.isExtensible||function(){return!0},a=!r(18)(function(){return f(Object.preventExtensions({}))}),s=function(t){u(t,e,{value:{i:"O"+ ++c,w:{}}})},l=function(t,n){if(!i(t))return"symbol"==typeof t?t:("string"==typeof t?"S":"P")+t;if(!o(t,e)){if(!f(t))return"F";if(!n)return"E";s(t)}return t[e].i},h=function(t,n){if(!o(t,e)){if(!f(t))return!0;if(!n)return!1;s(t)}return t[e].w},v=function(t){return a&&p.NEED&&f(t)&&!o(t,e)&&s(t),t},p=t.exports={KEY:e,NEED:!1,fastKey:l,getWeak:h,onFreeze:v}},function(t,n,r){var e=r(14),i=r(20),o=r(19);t.exports=r(12)?Object.defineProperties:function(t,n){i(t);for(var r,u=o(n),c=u.length,f=0;c>f;)e.f(t,r=u[f++],n[r]);return t}},function(t,n,r){var e=r(37),i=r(22),o=r(9),u=r(42),c=r(8),f=r(58),a=Object.getOwnPropertyDescriptor;n.f=r(12)?a:function(t,n){if(t=o(t),n=u(n,!0),f)try{return a(t,n)}catch(t){}if(c(t,n))return i(!e.f.call(t,n),t[n])}},function(t,n,r){var e=r(9),i=r(61).f,o={}.toString,u="object"==typeof window&&window&&Object.getOwnPropertyNames?Object.getOwnPropertyNames(window):[],c=function(t){try{return i(t)}catch(t){return u.slice()}};t.exports.f=function(t){return u&&"[object Window]"==o.call(t)?c(t):i(e(t))}},function(t,n,r){var e=r(8),i=r(77),o=r(39)("IE_PROTO"),u=Object.prototype;t.exports=Object.getPrototypeOf||function(t){return t=i(t),e(t,o)?t[o]:"function"==typeof t.constructor&&t instanceof t.constructor?t.constructor.prototype:t instanceof Object?u:null}},function(t,n,r){var e=r(41),i=r(33);t.exports=function(t){return function(n,r){var o,u,c=String(i(n)),f=e(r),a=c.length;return f<0||f>=a?t?"":void 0:(o=c.charCodeAt(f),o<55296||o>56319||f+1===a||(u=c.charCodeAt(f+1))<56320||u>57343?t?c.charAt(f):o:t?c.slice(f,f+2):u-56320+(o-55296<<10)+65536)}}},function(t,n,r){var e=r(41),i=Math.max,o=Math.min;t.exports=function(t,n){return t=e(t),t<0?i(t+n,0):o(t,n)}},function(t,n,r){var e=r(41),i=Math.min;t.exports=function(t){return t>0?i(e(t),9007199254740991):0}},function(t,n,r){"use strict";var e=r(89),i=r(97),o=r(35),u=r(9);t.exports=r(59)(Array,"Array",function(t,n){this._t=u(t),this._i=0,this._k=n},function(){var t=this._t,n=this._k,r=this._i++;return!t||r>=t.length?(this._t=void 0,i(1)):"keys"==n?i(0,r):"values"==n?i(0,t[r]):i(0,[r,t[r]])},"values"),o.Arguments=o.Array,e("keys"),e("values"),e("entries")},function(t,n){},function(t,n,r){"use strict";var e=r(104)(!0);r(59)(String,"String",function(t){this._t=String(t),this._i=0},function(){var t,n=this._t,r=this._i;return r>=n.length?{value:void 0,done:!0}:(t=e(n,r),this._i+=t.length,{value:t,done:!1})})},function(t,n,r){"use strict";var e=r(5),i=r(8),o=r(12),u=r(51),c=r(64),f=r(99).KEY,a=r(18),s=r(40),l=r(38),h=r(23),v=r(15),p=r(44),d=r(43),y=r(98),g=r(92),b=r(95),m=r(20),x=r(9),w=r(42),S=r(22),_=r(60),O=r(102),E=r(101),P=r(14),j=r(19),F=E.f,M=P.f,A=O.f,N=e.Symbol,T=e.JSON,I=T&&T.stringify,k="prototype",L=v("_hidden"),R=v("toPrimitive"),C={}.propertyIsEnumerable,D=s("symbol-registry"),U=s("symbols"),W=s("op-symbols"),G=Object[k],B="function"==typeof N,V=e.QObject,z=!V||!V[k]||!V[k].findChild,q=o&&a(function(){return 7!=_(M({},"a",{get:function(){return M(this,"a",{value:7}).a}})).a})?function(t,n,r){var e=F(G,n);e&&delete G[n],M(t,n,r),e&&t!==G&&M(G,n,e)}:M,K=function(t){var n=U[t]=_(N[k]);return n._k=t,n},J=B&&"symbol"==typeof N.iterator?function(t){return"symbol"==typeof t}:function(t){return t instanceof N},Y=function(t,n,r){return t===G&&Y(W,n,r),m(t),n=w(n,!0),m(r),i(U,n)?(r.enumerable?(i(t,L)&&t[L][n]&&(t[L][n]=!1),r=_(r,{enumerable:S(0,!1)})):(i(t,L)||M(t,L,S(1,{})),t[L][n]=!0),q(t,n,r)):M(t,n,r)},H=function(t,n){m(t);for(var r,e=g(n=x(n)),i=0,o=e.length;o>i;)Y(t,r=e[i++],n[r]);return t},$=function(t,n){return void 0===n?_(t):H(_(t),n)},X=function(t){var n=C.call(this,t=w(t,!0));return!(this===G&&i(U,t)&&!i(W,t))&&(!(n||!i(this,t)||!i(U,t)||i(this,L)&&this[L][t])||n)},Q=function(t,n){if(t=x(t),n=w(n,!0),t!==G||!i(U,n)||i(W,n)){var r=F(t,n);return!r||!i(U,n)||i(t,L)&&t[L][n]||(r.enumerable=!0),r}},Z=function(t){for(var n,r=A(x(t)),e=[],o=0;r.length>o;)i(U,n=r[o++])||n==L||n==f||e.push(n);return e},tt=function(t){for(var n,r=t===G,e=A(r?W:x(t)),o=[],u=0;e.length>u;)!i(U,n=e[u++])||r&&!i(G,n)||o.push(U[n]);return o};B||(N=function(){if(this instanceof N)throw TypeError("Symbol is not a constructor!");var t=h(arguments.length>0?arguments[0]:void 0),n=function(r){this===G&&n.call(W,r),i(this,L)&&i(this[L],t)&&(this[L][t]=!1),q(this,t,S(1,r))};return o&&z&&q(G,t,{configurable:!0,set:n}),K(t)},c(N[k],"toString",function(){return this._k}),E.f=Q,P.f=Y,r(61).f=O.f=Z,r(37).f=X,r(62).f=tt,o&&!r(36)&&c(G,"propertyIsEnumerable",X,!0),p.f=function(t){return K(v(t))}),u(u.G+u.W+u.F*!B,{Symbol:N});for(var nt="hasInstance,isConcatSpreadable,iterator,match,replace,search,species,split,toPrimitive,toStringTag,unscopables".split(","),rt=0;nt.length>rt;)v(nt[rt++]);for(var nt=j(v.store),rt=0;nt.length>rt;)d(nt[rt++]);u(u.S+u.F*!B,"Symbol",{for:function(t){return i(D,t+="")?D[t]:D[t]=N(t)},keyFor:function(t){if(J(t))return y(D,t);throw TypeError(t+" is not a symbol!")},useSetter:function(){z=!0},useSimple:function(){z=!1}}),u(u.S+u.F*!B,"Object",{create:$,defineProperty:Y,defineProperties:H,getOwnPropertyDescriptor:Q,getOwnPropertyNames:Z,getOwnPropertySymbols:tt}),T&&u(u.S+u.F*(!B||a(function(){var t=N();return"[null]"!=I([t])||"{}"!=I({a:t})||"{}"!=I(Object(t))})),"JSON",{stringify:function(t){if(void 0!==t&&!J(t)){for(var n,r,e=[t],i=1;arguments.length>i;)e.push(arguments[i++]);return n=e[1],"function"==typeof n&&(r=n),!r&&b(n)||(n=function(t,n){if(r&&(n=r.call(this,t,n)),!J(n))return n}),e[1]=n,I.apply(T,e)}}}),N[k][R]||r(13)(N[k],R,N[k].valueOf),l(N,"Symbol"),l(Math,"Math",!0),l(e.JSON,"JSON",!0)},function(t,n,r){r(43)("asyncIterator")},function(t,n,r){r(43)("observable")},function(t,n,r){r(107);for(var e=r(5),i=r(13),o=r(35),u=r(15)("toStringTag"),c=["NodeList","DOMTokenList","MediaList","StyleSheetList","CSSRuleList"],f=0;f<5;f++){var a=c[f],s=e[a],l=s&&s.prototype;l&&!l[u]&&i(l,u,a),o[a]=o.Array}},function(t,n,r){var e=r(45),i=r(7)("toStringTag"),o="Arguments"==e(function(){return arguments}()),u=function(t,n){try{return t[n]}catch(t){}};t.exports=function(t){var n,r,c;return void 0===t?"Undefined":null===t?"Null":"string"==typeof(r=u(n=Object(t),i))?r:o?e(n):"Object"==(c=e(n))&&"function"==typeof n.callee?"Arguments":c}},function(t,n,r){var e=r(45);t.exports=Object("z").propertyIsEnumerable(0)?Object:function(t){return"String"==e(t)?t.split(""):Object(t)}},function(t,n){n.f={}.propertyIsEnumerable},function(t,n,r){var e=r(30),i=r(16),o=r(75);t.exports=function(t){return function(n,r,u){var c,f=e(n),a=i(f.length),s=o(u,a);if(t&&r!=r){for(;a>s;)if((c=f[s++])!=c)return!0}else for(;a>s;s++)if((t||s in f)&&f[s]===r)return t||s||0;return!t&&-1}}},function(t,n,r){"use strict";var e=r(3),i=r(1),o=r(28),u=r(73),c=r(65),f=r(79),a=r(68),s=r(6),l=r(4),h=r(123),v=r(81),p=r(136);t.exports=function(t,n,r,d,y,g){var b=e[t],m=b,x=y?"set":"add",w=m&&m.prototype,S={},_=function(t){var n=w[t];o(w,t,"delete"==t?function(t){return!(g&&!s(t))&&n.call(this,0===t?0:t)}:"has"==t?function(t){return!(g&&!s(t))&&n.call(this,0===t?0:t)}:"get"==t?function(t){return g&&!s(t)?void 0:n.call(this,0===t?0:t)}:"add"==t?function(t){return n.call(this,0===t?0:t),this}:function(t,r){return n.call(this,0===t?0:t,r),this})};if("function"==typeof m&&(g||w.forEach&&!l(function(){(new m).entries().next()}))){var O=new m,E=O[x](g?{}:-0,1)!=O,P=l(function(){O.has(1)}),j=h(function(t){new m(t)}),F=!g&&l(function(){for(var t=new m,n=5;n--;)t[x](n,n);return!t.has(-0)});j||(m=n(function(n,r){a(n,m,t);var e=p(new b,n,m);return void 0!=r&&f(r,y,e[x],e),e}),m.prototype=w,w.constructor=m),(P||F)&&(_("delete"),_("has"),y&&_("get")),(F||E)&&_(x),g&&w.clear&&delete w.clear}else m=d.getConstructor(n,t,y,x),u(m.prototype,r),c.NEED=!0;return v(m,t),S[t]=m,i(i.G+i.W+i.F*(m!=b),S),g||d.setStrong(m,t,y),m}},function(t,n,r){"use strict";var e=r(27),i=r(28),o=r(4),u=r(46),c=r(7);t.exports=function(t,n,r){var f=c(t),a=r(u,f,""[t]),s=a[0],l=a[1];o(function(){var n={};return n[f]=function(){return 7},7!=""[t](n)})&&(i(String.prototype,t,s),e(RegExp.prototype,f,2==n?function(t,n){return l.call(t,this,n)}:function(t){return l.call(t,this)}))}
},function(t,n,r){"use strict";var e=r(2);t.exports=function(){var t=e(this),n="";return t.global&&(n+="g"),t.ignoreCase&&(n+="i"),t.multiline&&(n+="m"),t.unicode&&(n+="u"),t.sticky&&(n+="y"),n}},function(t,n){t.exports=function(t,n,r){var e=void 0===r;switch(n.length){case 0:return e?t():t.call(r);case 1:return e?t(n[0]):t.call(r,n[0]);case 2:return e?t(n[0],n[1]):t.call(r,n[0],n[1]);case 3:return e?t(n[0],n[1],n[2]):t.call(r,n[0],n[1],n[2]);case 4:return e?t(n[0],n[1],n[2],n[3]):t.call(r,n[0],n[1],n[2],n[3])}return t.apply(r,n)}},function(t,n,r){var e=r(6),i=r(45),o=r(7)("match");t.exports=function(t){var n;return e(t)&&(void 0!==(n=t[o])?!!n:"RegExp"==i(t))}},function(t,n,r){var e=r(7)("iterator"),i=!1;try{var o=[7][e]();o.return=function(){i=!0},Array.from(o,function(){throw 2})}catch(t){}t.exports=function(t,n){if(!n&&!i)return!1;var r=!1;try{var o=[7],u=o[e]();u.next=function(){return{done:r=!0}},o[e]=function(){return u},t(o)}catch(t){}return r}},function(t,n,r){t.exports=r(69)||!r(4)(function(){var t=Math.random();__defineSetter__.call(null,t,function(){}),delete r(3)[t]})},function(t,n){n.f=Object.getOwnPropertySymbols},function(t,n,r){var e=r(3),i="__core-js_shared__",o=e[i]||(e[i]={});t.exports=function(t){return o[t]||(o[t]={})}},function(t,n,r){for(var e,i=r(3),o=r(27),u=r(76),c=u("typed_array"),f=u("view"),a=!(!i.ArrayBuffer||!i.DataView),s=a,l=0,h="Int8Array,Uint8Array,Uint8ClampedArray,Int16Array,Uint16Array,Int32Array,Uint32Array,Float32Array,Float64Array".split(",");l<9;)(e=i[h[l++]])?(o(e.prototype,c,!0),o(e.prototype,f,!0)):s=!1;t.exports={ABV:a,CONSTR:s,TYPED:c,VIEW:f}},function(t,n){"use strict";var r={versions:function(){var t=window.navigator.userAgent;return{trident:t.indexOf("Trident")>-1,presto:t.indexOf("Presto")>-1,webKit:t.indexOf("AppleWebKit")>-1,gecko:t.indexOf("Gecko")>-1&&-1==t.indexOf("KHTML"),mobile:!!t.match(/AppleWebKit.*Mobile.*/),ios:!!t.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),android:t.indexOf("Android")>-1||t.indexOf("Linux")>-1,iPhone:t.indexOf("iPhone")>-1||t.indexOf("Mac")>-1,iPad:t.indexOf("iPad")>-1,webApp:-1==t.indexOf("Safari"),weixin:-1==t.indexOf("MicroMessenger")}}()};t.exports=r},function(t,n,r){"use strict";var e=r(85),i=function(t){return t&&t.__esModule?t:{default:t}}(e),o=function(){function t(t,n,e){return n||e?String.fromCharCode(n||e):r[t]||t}function n(t){return e[t]}var r={"&quot;":'"',"&lt;":"<","&gt;":">","&amp;":"&","&nbsp;":" "},e={};for(var u in r)e[r[u]]=u;return r["&apos;"]="'",e["'"]="&#39;",{encode:function(t){return t?(""+t).replace(/['<> "&]/g,n).replace(/\r?\n/g,"<br/>").replace(/\s/g,"&nbsp;"):""},decode:function(n){return n?(""+n).replace(/<br\s*\/?>/gi,"\n").replace(/&quot;|&lt;|&gt;|&amp;|&nbsp;|&apos;|&#(\d+);|&#(\d+)/g,t).replace(/\u00a0/g," "):""},encodeBase16:function(t){if(!t)return t;t+="";for(var n=[],r=0,e=t.length;e>r;r++)n.push(t.charCodeAt(r).toString(16).toUpperCase());return n.join("")},encodeBase16forJSON:function(t){if(!t)return t;t=t.replace(/[\u4E00-\u9FBF]/gi,function(t){return escape(t).replace("%u","\\u")});for(var n=[],r=0,e=t.length;e>r;r++)n.push(t.charCodeAt(r).toString(16).toUpperCase());return n.join("")},decodeBase16:function(t){if(!t)return t;t+="";for(var n=[],r=0,e=t.length;e>r;r+=2)n.push(String.fromCharCode("0x"+t.slice(r,r+2)));return n.join("")},encodeObject:function(t){if(t instanceof Array)for(var n=0,r=t.length;r>n;n++)t[n]=o.encodeObject(t[n]);else if("object"==(void 0===t?"undefined":(0,i.default)(t)))for(var e in t)t[e]=o.encodeObject(t[e]);else if("string"==typeof t)return o.encode(t);return t},loadScript:function(t){var n=document.createElement("script");document.getElementsByTagName("body")[0].appendChild(n),n.setAttribute("src",t)},addLoadEvent:function(t){var n=window.onload;"function"!=typeof window.onload?window.onload=t:window.onload=function(){n(),t()}}}}();t.exports=o},function(t,n,r){"use strict";var e=r(17),i=r(75),o=r(16);t.exports=function(t){for(var n=e(this),r=o(n.length),u=arguments.length,c=i(u>1?arguments[1]:void 0,r),f=u>2?arguments[2]:void 0,a=void 0===f?r:i(f,r);a>c;)n[c++]=t;return n}},function(t,n,r){"use strict";var e=r(11),i=r(66);t.exports=function(t,n,r){n in t?e.f(t,n,i(0,r)):t[n]=r}},function(t,n,r){var e=r(6),i=r(3).document,o=e(i)&&e(i.createElement);t.exports=function(t){return o?i.createElement(t):{}}},function(t,n){t.exports="constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf".split(",")},function(t,n,r){var e=r(7)("match");t.exports=function(t){var n=/./;try{"/./"[t](n)}catch(r){try{return n[e]=!1,!"/./"[t](n)}catch(t){}}return!0}},function(t,n,r){t.exports=r(3).document&&document.documentElement},function(t,n,r){var e=r(6),i=r(144).set;t.exports=function(t,n,r){var o,u=n.constructor;return u!==r&&"function"==typeof u&&(o=u.prototype)!==r.prototype&&e(o)&&i&&i(t,o),t}},function(t,n,r){var e=r(80),i=r(7)("iterator"),o=Array.prototype;t.exports=function(t){return void 0!==t&&(e.Array===t||o[i]===t)}},function(t,n,r){var e=r(45);t.exports=Array.isArray||function(t){return"Array"==e(t)}},function(t,n,r){"use strict";var e=r(70),i=r(66),o=r(81),u={};r(27)(u,r(7)("iterator"),function(){return this}),t.exports=function(t,n,r){t.prototype=e(u,{next:i(1,r)}),o(t,n+" Iterator")}},function(t,n,r){"use strict";var e=r(69),i=r(1),o=r(28),u=r(27),c=r(24),f=r(80),a=r(139),s=r(81),l=r(32),h=r(7)("iterator"),v=!([].keys&&"next"in[].keys()),p="keys",d="values",y=function(){return this};t.exports=function(t,n,r,g,b,m,x){a(r,n,g);var w,S,_,O=function(t){if(!v&&t in F)return F[t];switch(t){case p:case d:return function(){return new r(this,t)}}return function(){return new r(this,t)}},E=n+" Iterator",P=b==d,j=!1,F=t.prototype,M=F[h]||F["@@iterator"]||b&&F[b],A=M||O(b),N=b?P?O("entries"):A:void 0,T="Array"==n?F.entries||M:M;if(T&&(_=l(T.call(new t)))!==Object.prototype&&(s(_,E,!0),e||c(_,h)||u(_,h,y)),P&&M&&M.name!==d&&(j=!0,A=function(){return M.call(this)}),e&&!x||!v&&!j&&F[h]||u(F,h,A),f[n]=A,f[E]=y,b)if(w={values:P?A:O(d),keys:m?A:O(p),entries:N},x)for(S in w)S in F||o(F,S,w[S]);else i(i.P+i.F*(v||j),n,w);return w}},function(t,n){var r=Math.expm1;t.exports=!r||r(10)>22025.465794806718||r(10)<22025.465794806718||-2e-17!=r(-2e-17)?function(t){return 0==(t=+t)?t:t>-1e-6&&t<1e-6?t+t*t/2:Math.exp(t)-1}:r},function(t,n){t.exports=Math.sign||function(t){return 0==(t=+t)||t!=t?t:t<0?-1:1}},function(t,n,r){var e=r(3),i=r(151).set,o=e.MutationObserver||e.WebKitMutationObserver,u=e.process,c=e.Promise,f="process"==r(45)(u);t.exports=function(){var t,n,r,a=function(){var e,i;for(f&&(e=u.domain)&&e.exit();t;){i=t.fn,t=t.next;try{i()}catch(e){throw t?r():n=void 0,e}}n=void 0,e&&e.enter()};if(f)r=function(){u.nextTick(a)};else if(o){var s=!0,l=document.createTextNode("");new o(a).observe(l,{characterData:!0}),r=function(){l.data=s=!s}}else if(c&&c.resolve){var h=c.resolve();r=function(){h.then(a)}}else r=function(){i.call(e,a)};return function(e){var i={fn:e,next:void 0};n&&(n.next=i),t||(t=i,r()),n=i}}},function(t,n,r){var e=r(6),i=r(2),o=function(t,n){if(i(t),!e(n)&&null!==n)throw TypeError(n+": can't set as prototype!")};t.exports={set:Object.setPrototypeOf||("__proto__"in{}?function(t,n,e){try{e=r(53)(Function.call,r(31).f(Object.prototype,"__proto__").set,2),e(t,[]),n=!(t instanceof Array)}catch(t){n=!0}return function(t,r){return o(t,r),n?t.__proto__=r:e(t,r),t}}({},!1):void 0),check:o}},function(t,n,r){var e=r(126)("keys"),i=r(76);t.exports=function(t){return e[t]||(e[t]=i(t))}},function(t,n,r){var e=r(2),i=r(26),o=r(7)("species");t.exports=function(t,n){var r,u=e(t).constructor;return void 0===u||void 0==(r=e(u)[o])?n:i(r)}},function(t,n,r){var e=r(67),i=r(46);t.exports=function(t){return function(n,r){var o,u,c=String(i(n)),f=e(r),a=c.length;return f<0||f>=a?t?"":void 0:(o=c.charCodeAt(f),o<55296||o>56319||f+1===a||(u=c.charCodeAt(f+1))<56320||u>57343?t?c.charAt(f):o:t?c.slice(f,f+2):u-56320+(o-55296<<10)+65536)}}},function(t,n,r){var e=r(122),i=r(46);t.exports=function(t,n,r){if(e(n))throw TypeError("String#"+r+" doesn't accept regex!");return String(i(t))}},function(t,n,r){"use strict";var e=r(67),i=r(46);t.exports=function(t){var n=String(i(this)),r="",o=e(t);if(o<0||o==1/0)throw RangeError("Count can't be negative");for(;o>0;(o>>>=1)&&(n+=n))1&o&&(r+=n);return r}},function(t,n){t.exports="\t\n\v\f\r   ᠎             　\u2028\u2029\ufeff"},function(t,n,r){var e,i,o,u=r(53),c=r(121),f=r(135),a=r(132),s=r(3),l=s.process,h=s.setImmediate,v=s.clearImmediate,p=s.MessageChannel,d=0,y={},g="onreadystatechange",b=function(){var t=+this;if(y.hasOwnProperty(t)){var n=y[t];delete y[t],n()}},m=function(t){b.call(t.data)};h&&v||(h=function(t){for(var n=[],r=1;arguments.length>r;)n.push(arguments[r++]);return y[++d]=function(){c("function"==typeof t?t:Function(t),n)},e(d),d},v=function(t){delete y[t]},"process"==r(45)(l)?e=function(t){l.nextTick(u(b,t,1))}:p?(i=new p,o=i.port2,i.port1.onmessage=m,e=u(o.postMessage,o,1)):s.addEventListener&&"function"==typeof postMessage&&!s.importScripts?(e=function(t){s.postMessage(t+"","*")},s.addEventListener("message",m,!1)):e=g in a("script")?function(t){f.appendChild(a("script"))[g]=function(){f.removeChild(this),b.call(t)}}:function(t){setTimeout(u(b,t,1),0)}),t.exports={set:h,clear:v}},function(t,n,r){"use strict";var e=r(3),i=r(10),o=r(69),u=r(127),c=r(27),f=r(73),a=r(4),s=r(68),l=r(67),h=r(16),v=r(71).f,p=r(11).f,d=r(130),y=r(81),g="ArrayBuffer",b="DataView",m="prototype",x="Wrong length!",w="Wrong index!",S=e[g],_=e[b],O=e.Math,E=e.RangeError,P=e.Infinity,j=S,F=O.abs,M=O.pow,A=O.floor,N=O.log,T=O.LN2,I="buffer",k="byteLength",L="byteOffset",R=i?"_b":I,C=i?"_l":k,D=i?"_o":L,U=function(t,n,r){var e,i,o,u=Array(r),c=8*r-n-1,f=(1<<c)-1,a=f>>1,s=23===n?M(2,-24)-M(2,-77):0,l=0,h=t<0||0===t&&1/t<0?1:0;for(t=F(t),t!=t||t===P?(i=t!=t?1:0,e=f):(e=A(N(t)/T),t*(o=M(2,-e))<1&&(e--,o*=2),t+=e+a>=1?s/o:s*M(2,1-a),t*o>=2&&(e++,o/=2),e+a>=f?(i=0,e=f):e+a>=1?(i=(t*o-1)*M(2,n),e+=a):(i=t*M(2,a-1)*M(2,n),e=0));n>=8;u[l++]=255&i,i/=256,n-=8);for(e=e<<n|i,c+=n;c>0;u[l++]=255&e,e/=256,c-=8);return u[--l]|=128*h,u},W=function(t,n,r){var e,i=8*r-n-1,o=(1<<i)-1,u=o>>1,c=i-7,f=r-1,a=t[f--],s=127&a;for(a>>=7;c>0;s=256*s+t[f],f--,c-=8);for(e=s&(1<<-c)-1,s>>=-c,c+=n;c>0;e=256*e+t[f],f--,c-=8);if(0===s)s=1-u;else{if(s===o)return e?NaN:a?-P:P;e+=M(2,n),s-=u}return(a?-1:1)*e*M(2,s-n)},G=function(t){return t[3]<<24|t[2]<<16|t[1]<<8|t[0]},B=function(t){return[255&t]},V=function(t){return[255&t,t>>8&255]},z=function(t){return[255&t,t>>8&255,t>>16&255,t>>24&255]},q=function(t){return U(t,52,8)},K=function(t){return U(t,23,4)},J=function(t,n,r){p(t[m],n,{get:function(){return this[r]}})},Y=function(t,n,r,e){var i=+r,o=l(i);if(i!=o||o<0||o+n>t[C])throw E(w);var u=t[R]._b,c=o+t[D],f=u.slice(c,c+n);return e?f:f.reverse()},H=function(t,n,r,e,i,o){var u=+r,c=l(u);if(u!=c||c<0||c+n>t[C])throw E(w);for(var f=t[R]._b,a=c+t[D],s=e(+i),h=0;h<n;h++)f[a+h]=s[o?h:n-h-1]},$=function(t,n){s(t,S,g);var r=+n,e=h(r);if(r!=e)throw E(x);return e};if(u.ABV){if(!a(function(){new S})||!a(function(){new S(.5)})){S=function(t){return new j($(this,t))};for(var X,Q=S[m]=j[m],Z=v(j),tt=0;Z.length>tt;)(X=Z[tt++])in S||c(S,X,j[X]);o||(Q.constructor=S)}var nt=new _(new S(2)),rt=_[m].setInt8;nt.setInt8(0,2147483648),nt.setInt8(1,2147483649),!nt.getInt8(0)&&nt.getInt8(1)||f(_[m],{setInt8:function(t,n){rt.call(this,t,n<<24>>24)},setUint8:function(t,n){rt.call(this,t,n<<24>>24)}},!0)}else S=function(t){var n=$(this,t);this._b=d.call(Array(n),0),this[C]=n},_=function(t,n,r){s(this,_,b),s(t,S,b);var e=t[C],i=l(n);if(i<0||i>e)throw E("Wrong offset!");if(r=void 0===r?e-i:h(r),i+r>e)throw E(x);this[R]=t,this[D]=i,this[C]=r},i&&(J(S,k,"_l"),J(_,I,"_b"),J(_,k,"_l"),J(_,L,"_o")),f(_[m],{getInt8:function(t){return Y(this,1,t)[0]<<24>>24},getUint8:function(t){return Y(this,1,t)[0]},getInt16:function(t){var n=Y(this,2,t,arguments[1]);return(n[1]<<8|n[0])<<16>>16},getUint16:function(t){var n=Y(this,2,t,arguments[1]);return n[1]<<8|n[0]},getInt32:function(t){return G(Y(this,4,t,arguments[1]))},getUint32:function(t){return G(Y(this,4,t,arguments[1]))>>>0},getFloat32:function(t){return W(Y(this,4,t,arguments[1]),23,4)},getFloat64:function(t){return W(Y(this,8,t,arguments[1]),52,8)},setInt8:function(t,n){H(this,1,t,B,n)},setUint8:function(t,n){H(this,1,t,B,n)},setInt16:function(t,n){H(this,2,t,V,n,arguments[2])},setUint16:function(t,n){H(this,2,t,V,n,arguments[2])},setInt32:function(t,n){H(this,4,t,z,n,arguments[2])},setUint32:function(t,n){H(this,4,t,z,n,arguments[2])},setFloat32:function(t,n){H(this,4,t,K,n,arguments[2])},setFloat64:function(t,n){H(this,8,t,q,n,arguments[2])}});y(S,g),y(_,b),c(_[m],u.VIEW,!0),n[g]=S,n[b]=_},function(t,n,r){var e=r(3),i=r(52),o=r(69),u=r(182),c=r(11).f;t.exports=function(t){var n=i.Symbol||(i.Symbol=o?{}:e.Symbol||{});"_"==t.charAt(0)||t in n||c(n,t,{value:u.f(t)})}},function(t,n,r){var e=r(114),i=r(7)("iterator"),o=r(80);t.exports=r(52).getIteratorMethod=function(t){if(void 0!=t)return t[i]||t["@@iterator"]||o[e(t)]}},function(t,n,r){"use strict";var e=r(78),i=r(170),o=r(80),u=r(30);t.exports=r(140)(Array,"Array",function(t,n){this._t=u(t),this._i=0,this._k=n},function(){var t=this._t,n=this._k,r=this._i++;return!t||r>=t.length?(this._t=void 0,i(1)):"keys"==n?i(0,r):"values"==n?i(0,t[r]):i(0,[r,t[r]])},"values"),o.Arguments=o.Array,e("keys"),e("values"),e("entries")},function(t,n){function r(t,n){t.classList?t.classList.add(n):t.className+=" "+n}t.exports=r},function(t,n){function r(t,n){if(t.classList)t.classList.remove(n);else{var r=new RegExp("(^|\\b)"+n.split(" ").join("|")+"(\\b|$)","gi");t.className=t.className.replace(r," ")}}t.exports=r},function(t,n){function r(){throw new Error("setTimeout has not been defined")}function e(){throw new Error("clearTimeout has not been defined")}function i(t){if(s===setTimeout)return setTimeout(t,0);if((s===r||!s)&&setTimeout)return s=setTimeout,setTimeout(t,0);try{return s(t,0)}catch(n){try{return s.call(null,t,0)}catch(n){return s.call(this,t,0)}}}function o(t){if(l===clearTimeout)return clearTimeout(t);if((l===e||!l)&&clearTimeout)return l=clearTimeout,clearTimeout(t);try{return l(t)}catch(n){try{return l.call(null,t)}catch(n){return l.call(this,t)}}}function u(){d&&v&&(d=!1,v.length?p=v.concat(p):y=-1,p.length&&c())}function c(){if(!d){var t=i(u);d=!0;for(var n=p.length;n;){for(v=p,p=[];++y<n;)v&&v[y].run();y=-1,n=p.length}v=null,d=!1,o(t)}}function f(t,n){this.fun=t,this.array=n}function a(){}var s,l,h=t.exports={};!function(){try{s="function"==typeof setTimeout?setTimeout:r}catch(t){s=r}try{l="function"==typeof clearTimeout?clearTimeout:e}catch(t){l=e}}();var v,p=[],d=!1,y=-1;h.nextTick=function(t){var n=new Array(arguments.length-1);if(arguments.length>1)for(var r=1;r<arguments.length;r++)n[r-1]=arguments[r];p.push(new f(t,n)),1!==p.length||d||i(c)},f.prototype.run=function(){this.fun.apply(null,this.array)},h.title="browser",h.browser=!0,h.env={},h.argv=[],h.version="",h.versions={},h.on=a,h.addListener=a,h.once=a,h.off=a,h.removeListener=a,h.removeAllListeners=a,h.emit=a,h.prependListener=a,h.prependOnceListener=a,h.listeners=function(t){return[]},h.binding=function(t){throw new Error("process.binding is not supported")},h.cwd=function(){return"/"},h.chdir=function(t){throw new Error("process.chdir is not supported")},h.umask=function(){return 0}},function(t,n,r){var e=r(45);t.exports=function(t,n){if("number"!=typeof t&&"Number"!=e(t))throw TypeError(n);return+t}},function(t,n,r){"use strict";var e=r(17),i=r(75),o=r(16);t.exports=[].copyWithin||function(t,n){var r=e(this),u=o(r.length),c=i(t,u),f=i(n,u),a=arguments.length>2?arguments[2]:void 0,s=Math.min((void 0===a?u:i(a,u))-f,u-c),l=1;for(f<c&&c<f+s&&(l=-1,f+=s-1,c+=s-1);s-- >0;)f in r?r[c]=r[f]:delete r[c],c+=l,f+=l;return r}},function(t,n,r){var e=r(79);t.exports=function(t,n){var r=[];return e(t,!1,r.push,r,n),r}},function(t,n,r){var e=r(26),i=r(17),o=r(115),u=r(16);t.exports=function(t,n,r,c,f){e(n);var a=i(t),s=o(a),l=u(a.length),h=f?l-1:0,v=f?-1:1;if(r<2)for(;;){if(h in s){c=s[h],h+=v;break}if(h+=v,f?h<0:l<=h)throw TypeError("Reduce of empty array with no initial value")}for(;f?h>=0:l>h;h+=v)h in s&&(c=n(c,s[h],h,a));return c}},function(t,n,r){"use strict";var e=r(26),i=r(6),o=r(121),u=[].slice,c={},f=function(t,n,r){if(!(n in c)){for(var e=[],i=0;i<n;i++)e[i]="a["+i+"]";c[n]=Function("F,a","return new F("+e.join(",")+")")}return c[n](t,r)};t.exports=Function.bind||function(t){var n=e(this),r=u.call(arguments,1),c=function(){var e=r.concat(u.call(arguments));return this instanceof c?f(n,e.length,e):o(n,e,t)};return i(n.prototype)&&(c.prototype=n.prototype),c}},function(t,n,r){"use strict";var e=r(11).f,i=r(70),o=r(73),u=r(53),c=r(68),f=r(46),a=r(79),s=r(140),l=r(170),h=r(74),v=r(10),p=r(65).fastKey,d=v?"_s":"size",y=function(t,n){var r,e=p(n);if("F"!==e)return t._i[e];for(r=t._f;r;r=r.n)if(r.k==n)return r};t.exports={getConstructor:function(t,n,r,s){var l=t(function(t,e){c(t,l,n,"_i"),t._i=i(null),t._f=void 0,t._l=void 0,t[d]=0,void 0!=e&&a(e,r,t[s],t)});return o(l.prototype,{clear:function(){for(var t=this,n=t._i,r=t._f;r;r=r.n)r.r=!0,r.p&&(r.p=r.p.n=void 0),delete n[r.i];t._f=t._l=void 0,t[d]=0},delete:function(t){var n=this,r=y(n,t);if(r){var e=r.n,i=r.p;delete n._i[r.i],r.r=!0,i&&(i.n=e),e&&(e.p=i),n._f==r&&(n._f=e),n._l==r&&(n._l=i),n[d]--}return!!r},forEach:function(t){c(this,l,"forEach");for(var n,r=u(t,arguments.length>1?arguments[1]:void 0,3);n=n?n.n:this._f;)for(r(n.v,n.k,this);n&&n.r;)n=n.p},has:function(t){return!!y(this,t)}}),v&&e(l.prototype,"size",{get:function(){return f(this[d])}}),l},def:function(t,n,r){var e,i,o=y(t,n);return o?o.v=r:(t._l=o={i:i=p(n,!0),k:n,v:r,p:e=t._l,n:void 0,r:!1},t._f||(t._f=o),e&&(e.n=o),t[d]++,"F"!==i&&(t._i[i]=o)),t},getEntry:y,setStrong:function(t,n,r){s(t,n,function(t,n){this._t=t,this._k=n,this._l=void 0},function(){for(var t=this,n=t._k,r=t._l;r&&r.r;)r=r.p;return t._t&&(t._l=r=r?r.n:t._t._f)?"keys"==n?l(0,r.k):"values"==n?l(0,r.v):l(0,[r.k,r.v]):(t._t=void 0,l(1))},r?"entries":"values",!r,!0),h(n)}}},function(t,n,r){var e=r(114),i=r(161);t.exports=function(t){return function(){if(e(this)!=t)throw TypeError(t+"#toJSON isn't generic");return i(this)}}},function(t,n,r){"use strict";var e=r(73),i=r(65).getWeak,o=r(2),u=r(6),c=r(68),f=r(79),a=r(48),s=r(24),l=a(5),h=a(6),v=0,p=function(t){return t._l||(t._l=new d)},d=function(){this.a=[]},y=function(t,n){return l(t.a,function(t){return t[0]===n})};d.prototype={get:function(t){var n=y(this,t);if(n)return n[1]},has:function(t){return!!y(this,t)},set:function(t,n){var r=y(this,t);r?r[1]=n:this.a.push([t,n])},delete:function(t){var n=h(this.a,function(n){return n[0]===t});return~n&&this.a.splice(n,1),!!~n}},t.exports={getConstructor:function(t,n,r,o){var a=t(function(t,e){c(t,a,n,"_i"),t._i=v++,t._l=void 0,void 0!=e&&f(e,r,t[o],t)});return e(a.prototype,{delete:function(t){if(!u(t))return!1;var n=i(t);return!0===n?p(this).delete(t):n&&s(n,this._i)&&delete n[this._i]},has:function(t){if(!u(t))return!1;var n=i(t);return!0===n?p(this).has(t):n&&s(n,this._i)}}),a},def:function(t,n,r){var e=i(o(n),!0);return!0===e?p(t).set(n,r):e[t._i]=r,t},ufstore:p}},function(t,n,r){t.exports=!r(10)&&!r(4)(function(){return 7!=Object.defineProperty(r(132)("div"),"a",{get:function(){return 7}}).a})},function(t,n,r){var e=r(6),i=Math.floor;t.exports=function(t){return!e(t)&&isFinite(t)&&i(t)===t}},function(t,n,r){var e=r(2);t.exports=function(t,n,r,i){try{return i?n(e(r)[0],r[1]):n(r)}catch(n){var o=t.return;throw void 0!==o&&e(o.call(t)),n}}},function(t,n){t.exports=function(t,n){return{value:n,done:!!t}}},function(t,n){t.exports=Math.log1p||function(t){return(t=+t)>-1e-8&&t<1e-8?t-t*t/2:Math.log(1+t)}},function(t,n,r){"use strict";var e=r(72),i=r(125),o=r(116),u=r(17),c=r(115),f=Object.assign;t.exports=!f||r(4)(function(){var t={},n={},r=Symbol(),e="abcdefghijklmnopqrst";return t[r]=7,e.split("").forEach(function(t){n[t]=t}),7!=f({},t)[r]||Object.keys(f({},n)).join("")!=e})?function(t,n){for(var r=u(t),f=arguments.length,a=1,s=i.f,l=o.f;f>a;)for(var h,v=c(arguments[a++]),p=s?e(v).concat(s(v)):e(v),d=p.length,y=0;d>y;)l.call(v,h=p[y++])&&(r[h]=v[h]);return r}:f},function(t,n,r){var e=r(11),i=r(2),o=r(72);t.exports=r(10)?Object.defineProperties:function(t,n){i(t);for(var r,u=o(n),c=u.length,f=0;c>f;)e.f(t,r=u[f++],n[r]);return t}},function(t,n,r){var e=r(30),i=r(71).f,o={}.toString,u="object"==typeof window&&window&&Object.getOwnPropertyNames?Object.getOwnPropertyNames(window):[],c=function(t){try{return i(t)}catch(t){return u.slice()}};t.exports.f=function(t){return u&&"[object Window]"==o.call(t)?c(t):i(e(t))}},function(t,n,r){var e=r(24),i=r(30),o=r(117)(!1),u=r(145)("IE_PROTO");t.exports=function(t,n){var r,c=i(t),f=0,a=[];for(r in c)r!=u&&e(c,r)&&a.push(r);for(;n.length>f;)e(c,r=n[f++])&&(~o(a,r)||a.push(r));return a}},function(t,n,r){var e=r(72),i=r(30),o=r(116).f;t.exports=function(t){return function(n){for(var r,u=i(n),c=e(u),f=c.length,a=0,s=[];f>a;)o.call(u,r=c[a++])&&s.push(t?[r,u[r]]:u[r]);return s}}},function(t,n,r){var e=r(71),i=r(125),o=r(2),u=r(3).Reflect;t.exports=u&&u.ownKeys||function(t){var n=e.f(o(t)),r=i.f;return r?n.concat(r(t)):n}},function(t,n,r){var e=r(3).parseFloat,i=r(82).trim;t.exports=1/e(r(150)+"-0")!=-1/0?function(t){var n=i(String(t),3),r=e(n);return 0===r&&"-"==n.charAt(0)?-0:r}:e},function(t,n,r){var e=r(3).parseInt,i=r(82).trim,o=r(150),u=/^[\-+]?0[xX]/;t.exports=8!==e(o+"08")||22!==e(o+"0x16")?function(t,n){var r=i(String(t),3);return e(r,n>>>0||(u.test(r)?16:10))}:e},function(t,n){t.exports=Object.is||function(t,n){return t===n?0!==t||1/t==1/n:t!=t&&n!=n}},function(t,n,r){var e=r(16),i=r(149),o=r(46);t.exports=function(t,n,r,u){var c=String(o(t)),f=c.length,a=void 0===r?" ":String(r),s=e(n);if(s<=f||""==a)return c;var l=s-f,h=i.call(a,Math.ceil(l/a.length));return h.length>l&&(h=h.slice(0,l)),u?h+c:c+h}},function(t,n,r){n.f=r(7)},function(t,n,r){"use strict";var e=r(164);t.exports=r(118)("Map",function(t){return function(){return t(this,arguments.length>0?arguments[0]:void 0)}},{get:function(t){var n=e.getEntry(this,t);return n&&n.v},set:function(t,n){return e.def(this,0===t?0:t,n)}},e,!0)},function(t,n,r){r(10)&&"g"!=/./g.flags&&r(11).f(RegExp.prototype,"flags",{configurable:!0,get:r(120)})},function(t,n,r){"use strict";var e=r(164);t.exports=r(118)("Set",function(t){return function(){return t(this,arguments.length>0?arguments[0]:void 0)}},{add:function(t){return e.def(this,t=0===t?0:t,t)}},e)},function(t,n,r){"use strict";var e,i=r(48)(0),o=r(28),u=r(65),c=r(172),f=r(166),a=r(6),s=u.getWeak,l=Object.isExtensible,h=f.ufstore,v={},p=function(t){return function(){return t(this,arguments.length>0?arguments[0]:void 0)}},d={get:function(t){if(a(t)){var n=s(t);return!0===n?h(this).get(t):n?n[this._i]:void 0}},set:function(t,n){return f.def(this,t,n)}},y=t.exports=r(118)("WeakMap",p,d,f,!0,!0);7!=(new y).set((Object.freeze||Object)(v),7).get(v)&&(e=f.getConstructor(p),c(e.prototype,d),u.NEED=!0,i(["delete","has","get","set"],function(t){var n=y.prototype,r=n[t];o(n,t,function(n,i){if(a(n)&&!l(n)){this._f||(this._f=new e);var o=this._f[t](n,i);return"set"==t?this:o}return r.call(this,n,i)})}))},,,,function(t,n){"use strict";function r(){var t=document.querySelector("#page-nav");if(t&&!document.querySelector("#page-nav .extend.prev")&&(t.innerHTML='<a class="extend prev disabled" rel="prev">&laquo; Prev</a>'+t.innerHTML),t&&!document.querySelector("#page-nav .extend.next")&&(t.innerHTML=t.innerHTML+'<a class="extend next disabled" rel="next">Next &raquo;</a>'),yiliaConfig&&yiliaConfig.open_in_new){document.querySelectorAll(".article-entry a:not(.article-more-a)").forEach(function(t){var n=t.getAttribute("target");n&&""!==n||t.setAttribute("target","_blank")})}if(yiliaConfig&&yiliaConfig.toc_hide_index){document.querySelectorAll(".toc-number").forEach(function(t){t.style.display="none"})}var n=document.querySelector("#js-aboutme");n&&0!==n.length&&(n.innerHTML=n.innerText)}t.exports={init:r}},function(t,n,r){"use strict";function e(t){return t&&t.__esModule?t:{default:t}}function i(t,n){var r=/\/|index.html/g;return t.replace(r,"")===n.replace(r,"")}function o(){for(var t=document.querySelectorAll(".js-header-menu li a"),n=window.location.pathname,r=0,e=t.length;r<e;r++){var o=t[r];i(n,o.getAttribute("href"))&&(0,h.default)(o,"active")}}function u(t){for(var n=t.offsetLeft,r=t.offsetParent;null!==r;)n+=r.offsetLeft,r=r.offsetParent;return n}function c(t){for(var n=t.offsetTop,r=t.offsetParent;null!==r;)n+=r.offsetTop,r=r.offsetParent;return n}function f(t,n,r,e,i){var o=u(t),f=c(t)-n;if(f-r<=i){var a=t.$newDom;a||(a=t.cloneNode(!0),(0,d.default)(t,a),t.$newDom=a,a.style.position="fixed",a.style.top=(r||f)+"px",a.style.left=o+"px",a.style.zIndex=e||2,a.style.width="100%",a.style.color="#fff"),a.style.visibility="visible",t.style.visibility="hidden"}else{t.style.visibility="visible";var s=t.$newDom;s&&(s.style.visibility="hidden")}}function a(){var t=document.querySelector(".js-overlay"),n=document.querySelector(".js-header-menu");f(t,document.body.scrollTop,-63,2,0),f(n,document.body.scrollTop,1,3,0)}function s(){document.querySelector("#container").addEventListener("scroll",function(t){a()}),window.addEventListener("scroll",function(t){a()}),a()}var l=r(156),h=e(l),v=r(157),p=(e(v),r(382)),d=e(p),y=r(128),g=e(y),b=r(190),m=e(b),x=r(129);(function(){g.default.versions.mobile&&window.screen.width<800&&(o(),s())})(),(0,x.addLoadEvent)(function(){m.default.init()}),t.exports={}},,,,function(t,n,r){(function(t){"use strict";function n(t,n,r){t[n]||Object[e](t,n,{writable:!0,configurable:!0,value:r})}if(r(381),r(391),r(198),t._babelPolyfill)throw new Error("only one instance of babel-polyfill is allowed");t._babelPolyfill=!0;var e="defineProperty";n(String.prototype,"padLeft","".padStart),n(String.prototype,"padRight","".padEnd),"pop,reverse,shift,keys,values,entries,indexOf,every,some,forEach,map,filter,find,findIndex,includes,join,slice,concat,push,splice,unshift,sort,lastIndexOf,reduce,reduceRight,copyWithin,fill".split(",").forEach(function(t){[][t]&&n(Array,t,Function.call.bind([][t]))})}).call(n,function(){return this}())},,,function(t,n,r){r(210),t.exports=r(52).RegExp.escape},,,,function(t,n,r){var e=r(6),i=r(138),o=r(7)("species");t.exports=function(t){var n;return i(t)&&(n=t.constructor,"function"!=typeof n||n!==Array&&!i(n.prototype)||(n=void 0),e(n)&&null===(n=n[o])&&(n=void 0)),void 0===n?Array:n}},function(t,n,r){var e=r(202);t.exports=function(t,n){return new(e(t))(n)}},function(t,n,r){"use strict";var e=r(2),i=r(50),o="number";t.exports=function(t){if("string"!==t&&t!==o&&"default"!==t)throw TypeError("Incorrect hint");return i(e(this),t!=o)}},function(t,n,r){var e=r(72),i=r(125),o=r(116);t.exports=function(t){var n=e(t),r=i.f;if(r)for(var u,c=r(t),f=o.f,a=0;c.length>a;)f.call(t,u=c[a++])&&n.push(u);return n}},function(t,n,r){var e=r(72),i=r(30);t.exports=function(t,n){for(var r,o=i(t),u=e(o),c=u.length,f=0;c>f;)if(o[r=u[f++]]===n)return r}},function(t,n,r){"use strict";var e=r(208),i=r(121),o=r(26);t.exports=function(){for(var t=o(this),n=arguments.length,r=Array(n),u=0,c=e._,f=!1;n>u;)(r[u]=arguments[u++])===c&&(f=!0);return function(){var e,o=this,u=arguments.length,a=0,s=0;if(!f&&!u)return i(t,r,o);if(e=r.slice(),f)for(;n>a;a++)e[a]===c&&(e[a]=arguments[s++]);for(;u>s;)e.push(arguments[s++]);return i(t,e,o)}}},function(t,n,r){t.exports=r(3)},function(t,n){t.exports=function(t,n){var r=n===Object(n)?function(t){return n[t]}:n;return function(n){return String(n).replace(t,r)}}},function(t,n,r){var e=r(1),i=r(209)(/[\\^$*+?.()|[\]{}]/g,"\\$&");e(e.S,"RegExp",{escape:function(t){return i(t)}})},function(t,n,r){var e=r(1);e(e.P,"Array",{copyWithin:r(160)}),r(78)("copyWithin")},function(t,n,r){"use strict";var e=r(1),i=r(48)(4);e(e.P+e.F*!r(47)([].every,!0),"Array",{every:function(t){return i(this,t,arguments[1])}})},function(t,n,r){var e=r(1);e(e.P,"Array",{fill:r(130)}),r(78)("fill")},function(t,n,r){"use strict";var e=r(1),i=r(48)(2);e(e.P+e.F*!r(47)([].filter,!0),"Array",{filter:function(t){return i(this,t,arguments[1])}})},function(t,n,r){"use strict";var e=r(1),i=r(48)(6),o="findIndex",u=!0;o in[]&&Array(1)[o](function(){u=!1}),e(e.P+e.F*u,"Array",{findIndex:function(t){return i(this,t,arguments.length>1?arguments[1]:void 0)}}),r(78)(o)},function(t,n,r){"use strict";var e=r(1),i=r(48)(5),o="find",u=!0;o in[]&&Array(1)[o](function(){u=!1}),e(e.P+e.F*u,"Array",{find:function(t){return i(this,t,arguments.length>1?arguments[1]:void 0)}}),r(78)(o)},function(t,n,r){"use strict";var e=r(1),i=r(48)(0),o=r(47)([].forEach,!0);e(e.P+e.F*!o,"Array",{forEach:function(t){return i(this,t,arguments[1])}})},function(t,n,r){"use strict";var e=r(53),i=r(1),o=r(17),u=r(169),c=r(137),f=r(16),a=r(131),s=r(154);i(i.S+i.F*!r(123)(function(t){Array.from(t)}),"Array",{from:function(t){var n,r,i,l,h=o(t),v="function"==typeof this?this:Array,p=arguments.length,d=p>1?arguments[1]:void 0,y=void 0!==d,g=0,b=s(h);if(y&&(d=e(d,p>2?arguments[2]:void 0,2)),void 0==b||v==Array&&c(b))for(n=f(h.length),r=new v(n);n>g;g++)a(r,g,y?d(h[g],g):h[g]);else for(l=b.call(h),r=new v;!(i=l.next()).done;g++)a(r,g,y?u(l,d,[i.value,g],!0):i.value);return r.length=g,r}})},function(t,n,r){"use strict";var e=r(1),i=r(117)(!1),o=[].indexOf,u=!!o&&1/[1].indexOf(1,-0)<0;e(e.P+e.F*(u||!r(47)(o)),"Array",{indexOf:function(t){return u?o.apply(this,arguments)||0:i(this,t,arguments[1])}})},function(t,n,r){var e=r(1);e(e.S,"Array",{isArray:r(138)})},function(t,n,r){"use strict";var e=r(1),i=r(30),o=[].join;e(e.P+e.F*(r(115)!=Object||!r(47)(o)),"Array",{join:function(t){return o.call(i(this),void 0===t?",":t)}})},function(t,n,r){"use strict";var e=r(1),i=r(30),o=r(67),u=r(16),c=[].lastIndexOf,f=!!c&&1/[1].lastIndexOf(1,-0)<0;e(e.P+e.F*(f||!r(47)(c)),"Array",{lastIndexOf:function(t){if(f)return c.apply(this,arguments)||0;var n=i(this),r=u(n.length),e=r-1;for(arguments.length>1&&(e=Math.min(e,o(arguments[1]))),e<0&&(e=r+e);e>=0;e--)if(e in n&&n[e]===t)return e||0;return-1}})},function(t,n,r){"use strict";var e=r(1),i=r(48)(1);e(e.P+e.F*!r(47)([].map,!0),"Array",{map:function(t){return i(this,t,arguments[1])}})},function(t,n,r){"use strict";var e=r(1),i=r(131);e(e.S+e.F*r(4)(function(){function t(){}return!(Array.of.call(t)instanceof t)}),"Array",{of:function(){for(var t=0,n=arguments.length,r=new("function"==typeof this?this:Array)(n);n>t;)i(r,t,arguments[t++]);return r.length=n,r}})},function(t,n,r){"use strict";var e=r(1),i=r(162);e(e.P+e.F*!r(47)([].reduceRight,!0),"Array",{reduceRight:function(t){return i(this,t,arguments.length,arguments[1],!0)}})},function(t,n,r){"use strict";var e=r(1),i=r(162);e(e.P+e.F*!r(47)([].reduce,!0),"Array",{reduce:function(t){return i(this,t,arguments.length,arguments[1],!1)}})},function(t,n,r){"use strict";var e=r(1),i=r(135),o=r(45),u=r(75),c=r(16),f=[].slice;e(e.P+e.F*r(4)(function(){i&&f.call(i)}),"Array",{slice:function(t,n){var r=c(this.length),e=o(this);if(n=void 0===n?r:n,"Array"==e)return f.call(this,t,n);for(var i=u(t,r),a=u(n,r),s=c(a-i),l=Array(s),h=0;h<s;h++)l[h]="String"==e?this.charAt(i+h):this[i+h];return l}})},function(t,n,r){"use strict";var e=r(1),i=r(48)(3);e(e.P+e.F*!r(47)([].some,!0),"Array",{some:function(t){return i(this,t,arguments[1])}})},function(t,n,r){"use strict";var e=r(1),i=r(26),o=r(17),u=r(4),c=[].sort,f=[1,2,3];e(e.P+e.F*(u(function(){f.sort(void 0)})||!u(function(){f.sort(null)})||!r(47)(c)),"Array",{sort:function(t){return void 0===t?c.call(o(this)):c.call(o(this),i(t))}})},function(t,n,r){r(74)("Array")},function(t,n,r){var e=r(1);e(e.S,"Date",{now:function(){return(new Date).getTime()}})},function(t,n,r){"use strict";var e=r(1),i=r(4),o=Date.prototype.getTime,u=function(t){return t>9?t:"0"+t};e(e.P+e.F*(i(function(){return"0385-07-25T07:06:39.999Z"!=new Date(-5e13-1).toISOString()})||!i(function(){new Date(NaN).toISOString()})),"Date",{toISOString:function(){
if(!isFinite(o.call(this)))throw RangeError("Invalid time value");var t=this,n=t.getUTCFullYear(),r=t.getUTCMilliseconds(),e=n<0?"-":n>9999?"+":"";return e+("00000"+Math.abs(n)).slice(e?-6:-4)+"-"+u(t.getUTCMonth()+1)+"-"+u(t.getUTCDate())+"T"+u(t.getUTCHours())+":"+u(t.getUTCMinutes())+":"+u(t.getUTCSeconds())+"."+(r>99?r:"0"+u(r))+"Z"}})},function(t,n,r){"use strict";var e=r(1),i=r(17),o=r(50);e(e.P+e.F*r(4)(function(){return null!==new Date(NaN).toJSON()||1!==Date.prototype.toJSON.call({toISOString:function(){return 1}})}),"Date",{toJSON:function(t){var n=i(this),r=o(n);return"number"!=typeof r||isFinite(r)?n.toISOString():null}})},function(t,n,r){var e=r(7)("toPrimitive"),i=Date.prototype;e in i||r(27)(i,e,r(204))},function(t,n,r){var e=Date.prototype,i="Invalid Date",o="toString",u=e[o],c=e.getTime;new Date(NaN)+""!=i&&r(28)(e,o,function(){var t=c.call(this);return t===t?u.call(this):i})},function(t,n,r){var e=r(1);e(e.P,"Function",{bind:r(163)})},function(t,n,r){"use strict";var e=r(6),i=r(32),o=r(7)("hasInstance"),u=Function.prototype;o in u||r(11).f(u,o,{value:function(t){if("function"!=typeof this||!e(t))return!1;if(!e(this.prototype))return t instanceof this;for(;t=i(t);)if(this.prototype===t)return!0;return!1}})},function(t,n,r){var e=r(11).f,i=r(66),o=r(24),u=Function.prototype,c="name",f=Object.isExtensible||function(){return!0};c in u||r(10)&&e(u,c,{configurable:!0,get:function(){try{var t=this,n=(""+t).match(/^\s*function ([^ (]*)/)[1];return o(t,c)||!f(t)||e(t,c,i(5,n)),n}catch(t){return""}}})},function(t,n,r){var e=r(1),i=r(171),o=Math.sqrt,u=Math.acosh;e(e.S+e.F*!(u&&710==Math.floor(u(Number.MAX_VALUE))&&u(1/0)==1/0),"Math",{acosh:function(t){return(t=+t)<1?NaN:t>94906265.62425156?Math.log(t)+Math.LN2:i(t-1+o(t-1)*o(t+1))}})},function(t,n,r){function e(t){return isFinite(t=+t)&&0!=t?t<0?-e(-t):Math.log(t+Math.sqrt(t*t+1)):t}var i=r(1),o=Math.asinh;i(i.S+i.F*!(o&&1/o(0)>0),"Math",{asinh:e})},function(t,n,r){var e=r(1),i=Math.atanh;e(e.S+e.F*!(i&&1/i(-0)<0),"Math",{atanh:function(t){return 0==(t=+t)?t:Math.log((1+t)/(1-t))/2}})},function(t,n,r){var e=r(1),i=r(142);e(e.S,"Math",{cbrt:function(t){return i(t=+t)*Math.pow(Math.abs(t),1/3)}})},function(t,n,r){var e=r(1);e(e.S,"Math",{clz32:function(t){return(t>>>=0)?31-Math.floor(Math.log(t+.5)*Math.LOG2E):32}})},function(t,n,r){var e=r(1),i=Math.exp;e(e.S,"Math",{cosh:function(t){return(i(t=+t)+i(-t))/2}})},function(t,n,r){var e=r(1),i=r(141);e(e.S+e.F*(i!=Math.expm1),"Math",{expm1:i})},function(t,n,r){var e=r(1),i=r(142),o=Math.pow,u=o(2,-52),c=o(2,-23),f=o(2,127)*(2-c),a=o(2,-126),s=function(t){return t+1/u-1/u};e(e.S,"Math",{fround:function(t){var n,r,e=Math.abs(t),o=i(t);return e<a?o*s(e/a/c)*a*c:(n=(1+c/u)*e,r=n-(n-e),r>f||r!=r?o*(1/0):o*r)}})},function(t,n,r){var e=r(1),i=Math.abs;e(e.S,"Math",{hypot:function(t,n){for(var r,e,o=0,u=0,c=arguments.length,f=0;u<c;)r=i(arguments[u++]),f<r?(e=f/r,o=o*e*e+1,f=r):r>0?(e=r/f,o+=e*e):o+=r;return f===1/0?1/0:f*Math.sqrt(o)}})},function(t,n,r){var e=r(1),i=Math.imul;e(e.S+e.F*r(4)(function(){return-5!=i(4294967295,5)||2!=i.length}),"Math",{imul:function(t,n){var r=65535,e=+t,i=+n,o=r&e,u=r&i;return 0|o*u+((r&e>>>16)*u+o*(r&i>>>16)<<16>>>0)}})},function(t,n,r){var e=r(1);e(e.S,"Math",{log10:function(t){return Math.log(t)/Math.LN10}})},function(t,n,r){var e=r(1);e(e.S,"Math",{log1p:r(171)})},function(t,n,r){var e=r(1);e(e.S,"Math",{log2:function(t){return Math.log(t)/Math.LN2}})},function(t,n,r){var e=r(1);e(e.S,"Math",{sign:r(142)})},function(t,n,r){var e=r(1),i=r(141),o=Math.exp;e(e.S+e.F*r(4)(function(){return-2e-17!=!Math.sinh(-2e-17)}),"Math",{sinh:function(t){return Math.abs(t=+t)<1?(i(t)-i(-t))/2:(o(t-1)-o(-t-1))*(Math.E/2)}})},function(t,n,r){var e=r(1),i=r(141),o=Math.exp;e(e.S,"Math",{tanh:function(t){var n=i(t=+t),r=i(-t);return n==1/0?1:r==1/0?-1:(n-r)/(o(t)+o(-t))}})},function(t,n,r){var e=r(1);e(e.S,"Math",{trunc:function(t){return(t>0?Math.floor:Math.ceil)(t)}})},function(t,n,r){"use strict";var e=r(3),i=r(24),o=r(45),u=r(136),c=r(50),f=r(4),a=r(71).f,s=r(31).f,l=r(11).f,h=r(82).trim,v="Number",p=e[v],d=p,y=p.prototype,g=o(r(70)(y))==v,b="trim"in String.prototype,m=function(t){var n=c(t,!1);if("string"==typeof n&&n.length>2){n=b?n.trim():h(n,3);var r,e,i,o=n.charCodeAt(0);if(43===o||45===o){if(88===(r=n.charCodeAt(2))||120===r)return NaN}else if(48===o){switch(n.charCodeAt(1)){case 66:case 98:e=2,i=49;break;case 79:case 111:e=8,i=55;break;default:return+n}for(var u,f=n.slice(2),a=0,s=f.length;a<s;a++)if((u=f.charCodeAt(a))<48||u>i)return NaN;return parseInt(f,e)}}return+n};if(!p(" 0o1")||!p("0b1")||p("+0x1")){p=function(t){var n=arguments.length<1?0:t,r=this;return r instanceof p&&(g?f(function(){y.valueOf.call(r)}):o(r)!=v)?u(new d(m(n)),r,p):m(n)};for(var x,w=r(10)?a(d):"MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger".split(","),S=0;w.length>S;S++)i(d,x=w[S])&&!i(p,x)&&l(p,x,s(d,x));p.prototype=y,y.constructor=p,r(28)(e,v,p)}},function(t,n,r){var e=r(1);e(e.S,"Number",{EPSILON:Math.pow(2,-52)})},function(t,n,r){var e=r(1),i=r(3).isFinite;e(e.S,"Number",{isFinite:function(t){return"number"==typeof t&&i(t)}})},function(t,n,r){var e=r(1);e(e.S,"Number",{isInteger:r(168)})},function(t,n,r){var e=r(1);e(e.S,"Number",{isNaN:function(t){return t!=t}})},function(t,n,r){var e=r(1),i=r(168),o=Math.abs;e(e.S,"Number",{isSafeInteger:function(t){return i(t)&&o(t)<=9007199254740991}})},function(t,n,r){var e=r(1);e(e.S,"Number",{MAX_SAFE_INTEGER:9007199254740991})},function(t,n,r){var e=r(1);e(e.S,"Number",{MIN_SAFE_INTEGER:-9007199254740991})},function(t,n,r){var e=r(1),i=r(178);e(e.S+e.F*(Number.parseFloat!=i),"Number",{parseFloat:i})},function(t,n,r){var e=r(1),i=r(179);e(e.S+e.F*(Number.parseInt!=i),"Number",{parseInt:i})},function(t,n,r){"use strict";var e=r(1),i=r(67),o=r(159),u=r(149),c=1..toFixed,f=Math.floor,a=[0,0,0,0,0,0],s="Number.toFixed: incorrect invocation!",l="0",h=function(t,n){for(var r=-1,e=n;++r<6;)e+=t*a[r],a[r]=e%1e7,e=f(e/1e7)},v=function(t){for(var n=6,r=0;--n>=0;)r+=a[n],a[n]=f(r/t),r=r%t*1e7},p=function(){for(var t=6,n="";--t>=0;)if(""!==n||0===t||0!==a[t]){var r=String(a[t]);n=""===n?r:n+u.call(l,7-r.length)+r}return n},d=function(t,n,r){return 0===n?r:n%2==1?d(t,n-1,r*t):d(t*t,n/2,r)},y=function(t){for(var n=0,r=t;r>=4096;)n+=12,r/=4096;for(;r>=2;)n+=1,r/=2;return n};e(e.P+e.F*(!!c&&("0.000"!==8e-5.toFixed(3)||"1"!==.9.toFixed(0)||"1.25"!==1.255.toFixed(2)||"1000000000000000128"!==(0xde0b6b3a7640080).toFixed(0))||!r(4)(function(){c.call({})})),"Number",{toFixed:function(t){var n,r,e,c,f=o(this,s),a=i(t),g="",b=l;if(a<0||a>20)throw RangeError(s);if(f!=f)return"NaN";if(f<=-1e21||f>=1e21)return String(f);if(f<0&&(g="-",f=-f),f>1e-21)if(n=y(f*d(2,69,1))-69,r=n<0?f*d(2,-n,1):f/d(2,n,1),r*=4503599627370496,(n=52-n)>0){for(h(0,r),e=a;e>=7;)h(1e7,0),e-=7;for(h(d(10,e,1),0),e=n-1;e>=23;)v(1<<23),e-=23;v(1<<e),h(1,1),v(2),b=p()}else h(0,r),h(1<<-n,0),b=p()+u.call(l,a);return a>0?(c=b.length,b=g+(c<=a?"0."+u.call(l,a-c)+b:b.slice(0,c-a)+"."+b.slice(c-a))):b=g+b,b}})},function(t,n,r){"use strict";var e=r(1),i=r(4),o=r(159),u=1..toPrecision;e(e.P+e.F*(i(function(){return"1"!==u.call(1,void 0)})||!i(function(){u.call({})})),"Number",{toPrecision:function(t){var n=o(this,"Number#toPrecision: incorrect invocation!");return void 0===t?u.call(n):u.call(n,t)}})},function(t,n,r){var e=r(1);e(e.S+e.F,"Object",{assign:r(172)})},function(t,n,r){var e=r(1);e(e.S,"Object",{create:r(70)})},function(t,n,r){var e=r(1);e(e.S+e.F*!r(10),"Object",{defineProperties:r(173)})},function(t,n,r){var e=r(1);e(e.S+e.F*!r(10),"Object",{defineProperty:r(11).f})},function(t,n,r){var e=r(6),i=r(65).onFreeze;r(49)("freeze",function(t){return function(n){return t&&e(n)?t(i(n)):n}})},function(t,n,r){var e=r(30),i=r(31).f;r(49)("getOwnPropertyDescriptor",function(){return function(t,n){return i(e(t),n)}})},function(t,n,r){r(49)("getOwnPropertyNames",function(){return r(174).f})},function(t,n,r){var e=r(17),i=r(32);r(49)("getPrototypeOf",function(){return function(t){return i(e(t))}})},function(t,n,r){var e=r(6);r(49)("isExtensible",function(t){return function(n){return!!e(n)&&(!t||t(n))}})},function(t,n,r){var e=r(6);r(49)("isFrozen",function(t){return function(n){return!e(n)||!!t&&t(n)}})},function(t,n,r){var e=r(6);r(49)("isSealed",function(t){return function(n){return!e(n)||!!t&&t(n)}})},function(t,n,r){var e=r(1);e(e.S,"Object",{is:r(180)})},function(t,n,r){var e=r(17),i=r(72);r(49)("keys",function(){return function(t){return i(e(t))}})},function(t,n,r){var e=r(6),i=r(65).onFreeze;r(49)("preventExtensions",function(t){return function(n){return t&&e(n)?t(i(n)):n}})},function(t,n,r){var e=r(6),i=r(65).onFreeze;r(49)("seal",function(t){return function(n){return t&&e(n)?t(i(n)):n}})},function(t,n,r){var e=r(1);e(e.S,"Object",{setPrototypeOf:r(144).set})},function(t,n,r){"use strict";var e=r(114),i={};i[r(7)("toStringTag")]="z",i+""!="[object z]"&&r(28)(Object.prototype,"toString",function(){return"[object "+e(this)+"]"},!0)},function(t,n,r){var e=r(1),i=r(178);e(e.G+e.F*(parseFloat!=i),{parseFloat:i})},function(t,n,r){var e=r(1),i=r(179);e(e.G+e.F*(parseInt!=i),{parseInt:i})},function(t,n,r){"use strict";var e,i,o,u=r(69),c=r(3),f=r(53),a=r(114),s=r(1),l=r(6),h=r(26),v=r(68),p=r(79),d=r(146),y=r(151).set,g=r(143)(),b="Promise",m=c.TypeError,x=c.process,w=c[b],x=c.process,S="process"==a(x),_=function(){},O=!!function(){try{var t=w.resolve(1),n=(t.constructor={})[r(7)("species")]=function(t){t(_,_)};return(S||"function"==typeof PromiseRejectionEvent)&&t.then(_)instanceof n}catch(t){}}(),E=function(t,n){return t===n||t===w&&n===o},P=function(t){var n;return!(!l(t)||"function"!=typeof(n=t.then))&&n},j=function(t){return E(w,t)?new F(t):new i(t)},F=i=function(t){var n,r;this.promise=new t(function(t,e){if(void 0!==n||void 0!==r)throw m("Bad Promise constructor");n=t,r=e}),this.resolve=h(n),this.reject=h(r)},M=function(t){try{t()}catch(t){return{error:t}}},A=function(t,n){if(!t._n){t._n=!0;var r=t._c;g(function(){for(var e=t._v,i=1==t._s,o=0;r.length>o;)!function(n){var r,o,u=i?n.ok:n.fail,c=n.resolve,f=n.reject,a=n.domain;try{u?(i||(2==t._h&&I(t),t._h=1),!0===u?r=e:(a&&a.enter(),r=u(e),a&&a.exit()),r===n.promise?f(m("Promise-chain cycle")):(o=P(r))?o.call(r,c,f):c(r)):f(e)}catch(t){f(t)}}(r[o++]);t._c=[],t._n=!1,n&&!t._h&&N(t)})}},N=function(t){y.call(c,function(){var n,r,e,i=t._v;if(T(t)&&(n=M(function(){S?x.emit("unhandledRejection",i,t):(r=c.onunhandledrejection)?r({promise:t,reason:i}):(e=c.console)&&e.error&&e.error("Unhandled promise rejection",i)}),t._h=S||T(t)?2:1),t._a=void 0,n)throw n.error})},T=function(t){if(1==t._h)return!1;for(var n,r=t._a||t._c,e=0;r.length>e;)if(n=r[e++],n.fail||!T(n.promise))return!1;return!0},I=function(t){y.call(c,function(){var n;S?x.emit("rejectionHandled",t):(n=c.onrejectionhandled)&&n({promise:t,reason:t._v})})},k=function(t){var n=this;n._d||(n._d=!0,n=n._w||n,n._v=t,n._s=2,n._a||(n._a=n._c.slice()),A(n,!0))},L=function(t){var n,r=this;if(!r._d){r._d=!0,r=r._w||r;try{if(r===t)throw m("Promise can't be resolved itself");(n=P(t))?g(function(){var e={_w:r,_d:!1};try{n.call(t,f(L,e,1),f(k,e,1))}catch(t){k.call(e,t)}}):(r._v=t,r._s=1,A(r,!1))}catch(t){k.call({_w:r,_d:!1},t)}}};O||(w=function(t){v(this,w,b,"_h"),h(t),e.call(this);try{t(f(L,this,1),f(k,this,1))}catch(t){k.call(this,t)}},e=function(t){this._c=[],this._a=void 0,this._s=0,this._d=!1,this._v=void 0,this._h=0,this._n=!1},e.prototype=r(73)(w.prototype,{then:function(t,n){var r=j(d(this,w));return r.ok="function"!=typeof t||t,r.fail="function"==typeof n&&n,r.domain=S?x.domain:void 0,this._c.push(r),this._a&&this._a.push(r),this._s&&A(this,!1),r.promise},catch:function(t){return this.then(void 0,t)}}),F=function(){var t=new e;this.promise=t,this.resolve=f(L,t,1),this.reject=f(k,t,1)}),s(s.G+s.W+s.F*!O,{Promise:w}),r(81)(w,b),r(74)(b),o=r(52)[b],s(s.S+s.F*!O,b,{reject:function(t){var n=j(this);return(0,n.reject)(t),n.promise}}),s(s.S+s.F*(u||!O),b,{resolve:function(t){if(t instanceof w&&E(t.constructor,this))return t;var n=j(this);return(0,n.resolve)(t),n.promise}}),s(s.S+s.F*!(O&&r(123)(function(t){w.all(t).catch(_)})),b,{all:function(t){var n=this,r=j(n),e=r.resolve,i=r.reject,o=M(function(){var r=[],o=0,u=1;p(t,!1,function(t){var c=o++,f=!1;r.push(void 0),u++,n.resolve(t).then(function(t){f||(f=!0,r[c]=t,--u||e(r))},i)}),--u||e(r)});return o&&i(o.error),r.promise},race:function(t){var n=this,r=j(n),e=r.reject,i=M(function(){p(t,!1,function(t){n.resolve(t).then(r.resolve,e)})});return i&&e(i.error),r.promise}})},function(t,n,r){var e=r(1),i=r(26),o=r(2),u=(r(3).Reflect||{}).apply,c=Function.apply;e(e.S+e.F*!r(4)(function(){u(function(){})}),"Reflect",{apply:function(t,n,r){var e=i(t),f=o(r);return u?u(e,n,f):c.call(e,n,f)}})},function(t,n,r){var e=r(1),i=r(70),o=r(26),u=r(2),c=r(6),f=r(4),a=r(163),s=(r(3).Reflect||{}).construct,l=f(function(){function t(){}return!(s(function(){},[],t)instanceof t)}),h=!f(function(){s(function(){})});e(e.S+e.F*(l||h),"Reflect",{construct:function(t,n){o(t),u(n);var r=arguments.length<3?t:o(arguments[2]);if(h&&!l)return s(t,n,r);if(t==r){switch(n.length){case 0:return new t;case 1:return new t(n[0]);case 2:return new t(n[0],n[1]);case 3:return new t(n[0],n[1],n[2]);case 4:return new t(n[0],n[1],n[2],n[3])}var e=[null];return e.push.apply(e,n),new(a.apply(t,e))}var f=r.prototype,v=i(c(f)?f:Object.prototype),p=Function.apply.call(t,v,n);return c(p)?p:v}})},function(t,n,r){var e=r(11),i=r(1),o=r(2),u=r(50);i(i.S+i.F*r(4)(function(){Reflect.defineProperty(e.f({},1,{value:1}),1,{value:2})}),"Reflect",{defineProperty:function(t,n,r){o(t),n=u(n,!0),o(r);try{return e.f(t,n,r),!0}catch(t){return!1}}})},function(t,n,r){var e=r(1),i=r(31).f,o=r(2);e(e.S,"Reflect",{deleteProperty:function(t,n){var r=i(o(t),n);return!(r&&!r.configurable)&&delete t[n]}})},function(t,n,r){"use strict";var e=r(1),i=r(2),o=function(t){this._t=i(t),this._i=0;var n,r=this._k=[];for(n in t)r.push(n)};r(139)(o,"Object",function(){var t,n=this,r=n._k;do{if(n._i>=r.length)return{value:void 0,done:!0}}while(!((t=r[n._i++])in n._t));return{value:t,done:!1}}),e(e.S,"Reflect",{enumerate:function(t){return new o(t)}})},function(t,n,r){var e=r(31),i=r(1),o=r(2);i(i.S,"Reflect",{getOwnPropertyDescriptor:function(t,n){return e.f(o(t),n)}})},function(t,n,r){var e=r(1),i=r(32),o=r(2);e(e.S,"Reflect",{getPrototypeOf:function(t){return i(o(t))}})},function(t,n,r){function e(t,n){var r,c,s=arguments.length<3?t:arguments[2];return a(t)===s?t[n]:(r=i.f(t,n))?u(r,"value")?r.value:void 0!==r.get?r.get.call(s):void 0:f(c=o(t))?e(c,n,s):void 0}var i=r(31),o=r(32),u=r(24),c=r(1),f=r(6),a=r(2);c(c.S,"Reflect",{get:e})},function(t,n,r){var e=r(1);e(e.S,"Reflect",{has:function(t,n){return n in t}})},function(t,n,r){var e=r(1),i=r(2),o=Object.isExtensible;e(e.S,"Reflect",{isExtensible:function(t){return i(t),!o||o(t)}})},function(t,n,r){var e=r(1);e(e.S,"Reflect",{ownKeys:r(177)})},function(t,n,r){var e=r(1),i=r(2),o=Object.preventExtensions;e(e.S,"Reflect",{preventExtensions:function(t){i(t);try{return o&&o(t),!0}catch(t){return!1}}})},function(t,n,r){var e=r(1),i=r(144);i&&e(e.S,"Reflect",{setPrototypeOf:function(t,n){i.check(t,n);try{return i.set(t,n),!0}catch(t){return!1}}})},function(t,n,r){function e(t,n,r){var f,h,v=arguments.length<4?t:arguments[3],p=o.f(s(t),n);if(!p){if(l(h=u(t)))return e(h,n,r,v);p=a(0)}return c(p,"value")?!(!1===p.writable||!l(v)||(f=o.f(v,n)||a(0),f.value=r,i.f(v,n,f),0)):void 0!==p.set&&(p.set.call(v,r),!0)}var i=r(11),o=r(31),u=r(32),c=r(24),f=r(1),a=r(66),s=r(2),l=r(6);f(f.S,"Reflect",{set:e})},function(t,n,r){var e=r(3),i=r(136),o=r(11).f,u=r(71).f,c=r(122),f=r(120),a=e.RegExp,s=a,l=a.prototype,h=/a/g,v=/a/g,p=new a(h)!==h;if(r(10)&&(!p||r(4)(function(){return v[r(7)("match")]=!1,a(h)!=h||a(v)==v||"/a/i"!=a(h,"i")}))){a=function(t,n){var r=this instanceof a,e=c(t),o=void 0===n;return!r&&e&&t.constructor===a&&o?t:i(p?new s(e&&!o?t.source:t,n):s((e=t instanceof a)?t.source:t,e&&o?f.call(t):n),r?this:l,a)};for(var d=u(s),y=0;d.length>y;)!function(t){t in a||o(a,t,{configurable:!0,get:function(){return s[t]},set:function(n){s[t]=n}})}(d[y++]);l.constructor=a,a.prototype=l,r(28)(e,"RegExp",a)}r(74)("RegExp")},function(t,n,r){r(119)("match",1,function(t,n,r){return[function(r){"use strict";var e=t(this),i=void 0==r?void 0:r[n];return void 0!==i?i.call(r,e):new RegExp(r)[n](String(e))},r]})},function(t,n,r){r(119)("replace",2,function(t,n,r){return[function(e,i){"use strict";var o=t(this),u=void 0==e?void 0:e[n];return void 0!==u?u.call(e,o,i):r.call(String(o),e,i)},r]})},function(t,n,r){r(119)("search",1,function(t,n,r){return[function(r){"use strict";var e=t(this),i=void 0==r?void 0:r[n];return void 0!==i?i.call(r,e):new RegExp(r)[n](String(e))},r]})},function(t,n,r){r(119)("split",2,function(t,n,e){"use strict";var i=r(122),o=e,u=[].push,c="split",f="length",a="lastIndex";if("c"=="abbc"[c](/(b)*/)[1]||4!="test"[c](/(?:)/,-1)[f]||2!="ab"[c](/(?:ab)*/)[f]||4!="."[c](/(.?)(.?)/)[f]||"."[c](/()()/)[f]>1||""[c](/.?/)[f]){var s=void 0===/()??/.exec("")[1];e=function(t,n){var r=String(this);if(void 0===t&&0===n)return[];if(!i(t))return o.call(r,t,n);var e,c,l,h,v,p=[],d=(t.ignoreCase?"i":"")+(t.multiline?"m":"")+(t.unicode?"u":"")+(t.sticky?"y":""),y=0,g=void 0===n?4294967295:n>>>0,b=new RegExp(t.source,d+"g");for(s||(e=new RegExp("^"+b.source+"$(?!\\s)",d));(c=b.exec(r))&&!((l=c.index+c[0][f])>y&&(p.push(r.slice(y,c.index)),!s&&c[f]>1&&c[0].replace(e,function(){for(v=1;v<arguments[f]-2;v++)void 0===arguments[v]&&(c[v]=void 0)}),c[f]>1&&c.index<r[f]&&u.apply(p,c.slice(1)),h=c[0][f],y=l,p[f]>=g));)b[a]===c.index&&b[a]++;return y===r[f]?!h&&b.test("")||p.push(""):p.push(r.slice(y)),p[f]>g?p.slice(0,g):p}}else"0"[c](void 0,0)[f]&&(e=function(t,n){return void 0===t&&0===n?[]:o.call(this,t,n)});return[function(r,i){var o=t(this),u=void 0==r?void 0:r[n];return void 0!==u?u.call(r,o,i):e.call(String(o),r,i)},e]})},function(t,n,r){"use strict";r(184);var e=r(2),i=r(120),o=r(10),u="toString",c=/./[u],f=function(t){r(28)(RegExp.prototype,u,t,!0)};r(4)(function(){return"/a/b"!=c.call({source:"a",flags:"b"})})?f(function(){var t=e(this);return"/".concat(t.source,"/","flags"in t?t.flags:!o&&t instanceof RegExp?i.call(t):void 0)}):c.name!=u&&f(function(){return c.call(this)})},function(t,n,r){"use strict";r(29)("anchor",function(t){return function(n){return t(this,"a","name",n)}})},function(t,n,r){"use strict";r(29)("big",function(t){return function(){return t(this,"big","","")}})},function(t,n,r){"use strict";r(29)("blink",function(t){return function(){return t(this,"blink","","")}})},function(t,n,r){"use strict";r(29)("bold",function(t){return function(){return t(this,"b","","")}})},function(t,n,r){"use strict";var e=r(1),i=r(147)(!1);e(e.P,"String",{codePointAt:function(t){return i(this,t)}})},function(t,n,r){"use strict";var e=r(1),i=r(16),o=r(148),u="endsWith",c=""[u];e(e.P+e.F*r(134)(u),"String",{endsWith:function(t){var n=o(this,t,u),r=arguments.length>1?arguments[1]:void 0,e=i(n.length),f=void 0===r?e:Math.min(i(r),e),a=String(t);return c?c.call(n,a,f):n.slice(f-a.length,f)===a}})},function(t,n,r){"use strict";r(29)("fixed",function(t){return function(){return t(this,"tt","","")}})},function(t,n,r){"use strict";r(29)("fontcolor",function(t){return function(n){return t(this,"font","color",n)}})},function(t,n,r){"use strict";r(29)("fontsize",function(t){return function(n){return t(this,"font","size",n)}})},function(t,n,r){var e=r(1),i=r(75),o=String.fromCharCode,u=String.fromCodePoint;e(e.S+e.F*(!!u&&1!=u.length),"String",{fromCodePoint:function(t){for(var n,r=[],e=arguments.length,u=0;e>u;){if(n=+arguments[u++],i(n,1114111)!==n)throw RangeError(n+" is not a valid code point");r.push(n<65536?o(n):o(55296+((n-=65536)>>10),n%1024+56320))}return r.join("")}})},function(t,n,r){"use strict";var e=r(1),i=r(148),o="includes";e(e.P+e.F*r(134)(o),"String",{includes:function(t){return!!~i(this,t,o).indexOf(t,arguments.length>1?arguments[1]:void 0)}})},function(t,n,r){"use strict";r(29)("italics",function(t){return function(){return t(this,"i","","")}})},function(t,n,r){"use strict";var e=r(147)(!0);r(140)(String,"String",function(t){this._t=String(t),this._i=0},function(){var t,n=this._t,r=this._i;return r>=n.length?{value:void 0,done:!0}:(t=e(n,r),this._i+=t.length,{value:t,done:!1})})},function(t,n,r){"use strict";r(29)("link",function(t){return function(n){return t(this,"a","href",n)}})},function(t,n,r){var e=r(1),i=r(30),o=r(16);e(e.S,"String",{raw:function(t){for(var n=i(t.raw),r=o(n.length),e=arguments.length,u=[],c=0;r>c;)u.push(String(n[c++])),c<e&&u.push(String(arguments[c]));return u.join("")}})},function(t,n,r){var e=r(1);e(e.P,"String",{repeat:r(149)})},function(t,n,r){"use strict";r(29)("small",function(t){return function(){return t(this,"small","","")}})},function(t,n,r){"use strict";var e=r(1),i=r(16),o=r(148),u="startsWith",c=""[u];e(e.P+e.F*r(134)(u),"String",{startsWith:function(t){var n=o(this,t,u),r=i(Math.min(arguments.length>1?arguments[1]:void 0,n.length)),e=String(t);return c?c.call(n,e,r):n.slice(r,r+e.length)===e}})},function(t,n,r){"use strict";r(29)("strike",function(t){return function(){return t(this,"strike","","")}})},function(t,n,r){"use strict";r(29)("sub",function(t){return function(){return t(this,"sub","","")}})},function(t,n,r){"use strict";r(29)("sup",function(t){return function(){return t(this,"sup","","")}})},function(t,n,r){"use strict";r(82)("trim",function(t){return function(){return t(this,3)}})},function(t,n,r){"use strict";var e=r(3),i=r(24),o=r(10),u=r(1),c=r(28),f=r(65).KEY,a=r(4),s=r(126),l=r(81),h=r(76),v=r(7),p=r(182),d=r(153),y=r(206),g=r(205),b=r(138),m=r(2),x=r(30),w=r(50),S=r(66),_=r(70),O=r(174),E=r(31),P=r(11),j=r(72),F=E.f,M=P.f,A=O.f,N=e.Symbol,T=e.JSON,I=T&&T.stringify,k="prototype",L=v("_hidden"),R=v("toPrimitive"),C={}.propertyIsEnumerable,D=s("symbol-registry"),U=s("symbols"),W=s("op-symbols"),G=Object[k],B="function"==typeof N,V=e.QObject,z=!V||!V[k]||!V[k].findChild,q=o&&a(function(){return 7!=_(M({},"a",{get:function(){return M(this,"a",{value:7}).a}})).a})?function(t,n,r){var e=F(G,n);e&&delete G[n],M(t,n,r),e&&t!==G&&M(G,n,e)}:M,K=function(t){var n=U[t]=_(N[k]);return n._k=t,n},J=B&&"symbol"==typeof N.iterator?function(t){return"symbol"==typeof t}:function(t){return t instanceof N},Y=function(t,n,r){return t===G&&Y(W,n,r),m(t),n=w(n,!0),m(r),i(U,n)?(r.enumerable?(i(t,L)&&t[L][n]&&(t[L][n]=!1),r=_(r,{enumerable:S(0,!1)})):(i(t,L)||M(t,L,S(1,{})),t[L][n]=!0),q(t,n,r)):M(t,n,r)},H=function(t,n){m(t);for(var r,e=g(n=x(n)),i=0,o=e.length;o>i;)Y(t,r=e[i++],n[r]);return t},$=function(t,n){return void 0===n?_(t):H(_(t),n)},X=function(t){var n=C.call(this,t=w(t,!0));return!(this===G&&i(U,t)&&!i(W,t))&&(!(n||!i(this,t)||!i(U,t)||i(this,L)&&this[L][t])||n)},Q=function(t,n){if(t=x(t),n=w(n,!0),t!==G||!i(U,n)||i(W,n)){var r=F(t,n);return!r||!i(U,n)||i(t,L)&&t[L][n]||(r.enumerable=!0),r}},Z=function(t){for(var n,r=A(x(t)),e=[],o=0;r.length>o;)i(U,n=r[o++])||n==L||n==f||e.push(n);return e},tt=function(t){for(var n,r=t===G,e=A(r?W:x(t)),o=[],u=0;e.length>u;)!i(U,n=e[u++])||r&&!i(G,n)||o.push(U[n]);return o};B||(N=function(){if(this instanceof N)throw TypeError("Symbol is not a constructor!");var t=h(arguments.length>0?arguments[0]:void 0),n=function(r){this===G&&n.call(W,r),i(this,L)&&i(this[L],t)&&(this[L][t]=!1),q(this,t,S(1,r))};return o&&z&&q(G,t,{configurable:!0,set:n}),K(t)},c(N[k],"toString",function(){return this._k}),E.f=Q,P.f=Y,r(71).f=O.f=Z,r(116).f=X,r(125).f=tt,o&&!r(69)&&c(G,"propertyIsEnumerable",X,!0),p.f=function(t){return K(v(t))}),u(u.G+u.W+u.F*!B,{Symbol:N});for(var nt="hasInstance,isConcatSpreadable,iterator,match,replace,search,species,split,toPrimitive,toStringTag,unscopables".split(","),rt=0;nt.length>rt;)v(nt[rt++]);for(var nt=j(v.store),rt=0;nt.length>rt;)d(nt[rt++]);u(u.S+u.F*!B,"Symbol",{for:function(t){return i(D,t+="")?D[t]:D[t]=N(t)},keyFor:function(t){if(J(t))return y(D,t);throw TypeError(t+" is not a symbol!")},useSetter:function(){z=!0},useSimple:function(){z=!1}}),u(u.S+u.F*!B,"Object",{create:$,defineProperty:Y,defineProperties:H,getOwnPropertyDescriptor:Q,getOwnPropertyNames:Z,getOwnPropertySymbols:tt}),T&&u(u.S+u.F*(!B||a(function(){var t=N();return"[null]"!=I([t])||"{}"!=I({a:t})||"{}"!=I(Object(t))})),"JSON",{stringify:function(t){if(void 0!==t&&!J(t)){for(var n,r,e=[t],i=1;arguments.length>i;)e.push(arguments[i++]);return n=e[1],"function"==typeof n&&(r=n),!r&&b(n)||(n=function(t,n){if(r&&(n=r.call(this,t,n)),!J(n))return n}),e[1]=n,I.apply(T,e)}}}),N[k][R]||r(27)(N[k],R,N[k].valueOf),l(N,"Symbol"),l(Math,"Math",!0),l(e.JSON,"JSON",!0)},function(t,n,r){"use strict";var e=r(1),i=r(127),o=r(152),u=r(2),c=r(75),f=r(16),a=r(6),s=r(3).ArrayBuffer,l=r(146),h=o.ArrayBuffer,v=o.DataView,p=i.ABV&&s.isView,d=h.prototype.slice,y=i.VIEW,g="ArrayBuffer";e(e.G+e.W+e.F*(s!==h),{ArrayBuffer:h}),e(e.S+e.F*!i.CONSTR,g,{isView:function(t){return p&&p(t)||a(t)&&y in t}}),e(e.P+e.U+e.F*r(4)(function(){return!new h(2).slice(1,void 0).byteLength}),g,{slice:function(t,n){if(void 0!==d&&void 0===n)return d.call(u(this),t);for(var r=u(this).byteLength,e=c(t,r),i=c(void 0===n?r:n,r),o=new(l(this,h))(f(i-e)),a=new v(this),s=new v(o),p=0;e<i;)s.setUint8(p++,a.getUint8(e++));return o}}),r(74)(g)},function(t,n,r){var e=r(1);e(e.G+e.W+e.F*!r(127).ABV,{DataView:r(152).DataView})},function(t,n,r){r(55)("Float32",4,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Float64",8,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Int16",2,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Int32",4,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Int8",1,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Uint16",2,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Uint32",4,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Uint8",1,function(t){return function(n,r,e){return t(this,n,r,e)}})},function(t,n,r){r(55)("Uint8",1,function(t){return function(n,r,e){return t(this,n,r,e)}},!0)},function(t,n,r){"use strict";var e=r(166);r(118)("WeakSet",function(t){return function(){return t(this,arguments.length>0?arguments[0]:void 0)}},{add:function(t){return e.def(this,t,!0)}},e,!1,!0)},function(t,n,r){"use strict";var e=r(1),i=r(117)(!0);e(e.P,"Array",{includes:function(t){return i(this,t,arguments.length>1?arguments[1]:void 0)}}),r(78)("includes")},function(t,n,r){var e=r(1),i=r(143)(),o=r(3).process,u="process"==r(45)(o);e(e.G,{asap:function(t){var n=u&&o.domain;i(n?n.bind(t):t)}})},function(t,n,r){var e=r(1),i=r(45);e(e.S,"Error",{isError:function(t){return"Error"===i(t)}})},function(t,n,r){var e=r(1);e(e.P+e.R,"Map",{toJSON:r(165)("Map")})},function(t,n,r){var e=r(1);e(e.S,"Math",{iaddh:function(t,n,r,e){var i=t>>>0,o=n>>>0,u=r>>>0;return o+(e>>>0)+((i&u|(i|u)&~(i+u>>>0))>>>31)|0}})},function(t,n,r){var e=r(1);e(e.S,"Math",{imulh:function(t,n){var r=65535,e=+t,i=+n,o=e&r,u=i&r,c=e>>16,f=i>>16,a=(c*u>>>0)+(o*u>>>16);return c*f+(a>>16)+((o*f>>>0)+(a&r)>>16)}})},function(t,n,r){var e=r(1);e(e.S,"Math",{isubh:function(t,n,r,e){var i=t>>>0,o=n>>>0,u=r>>>0;return o-(e>>>0)-((~i&u|~(i^u)&i-u>>>0)>>>31)|0}})},function(t,n,r){var e=r(1);e(e.S,"Math",{umulh:function(t,n){var r=65535,e=+t,i=+n,o=e&r,u=i&r,c=e>>>16,f=i>>>16,a=(c*u>>>0)+(o*u>>>16);return c*f+(a>>>16)+((o*f>>>0)+(a&r)>>>16)}})},function(t,n,r){"use strict";var e=r(1),i=r(17),o=r(26),u=r(11);r(10)&&e(e.P+r(124),"Object",{__defineGetter__:function(t,n){u.f(i(this),t,{get:o(n),enumerable:!0,configurable:!0})}})},function(t,n,r){"use strict";var e=r(1),i=r(17),o=r(26),u=r(11);r(10)&&e(e.P+r(124),"Object",{__defineSetter__:function(t,n){u.f(i(this),t,{set:o(n),enumerable:!0,configurable:!0})}})},function(t,n,r){var e=r(1),i=r(176)(!0);e(e.S,"Object",{entries:function(t){return i(t)}})},function(t,n,r){var e=r(1),i=r(177),o=r(30),u=r(31),c=r(131);e(e.S,"Object",{getOwnPropertyDescriptors:function(t){for(var n,r=o(t),e=u.f,f=i(r),a={},s=0;f.length>s;)c(a,n=f[s++],e(r,n));return a}})},function(t,n,r){"use strict";var e=r(1),i=r(17),o=r(50),u=r(32),c=r(31).f;r(10)&&e(e.P+r(124),"Object",{__lookupGetter__:function(t){var n,r=i(this),e=o(t,!0);do{if(n=c(r,e))return n.get}while(r=u(r))}})},function(t,n,r){"use strict";var e=r(1),i=r(17),o=r(50),u=r(32),c=r(31).f;r(10)&&e(e.P+r(124),"Object",{__lookupSetter__:function(t){var n,r=i(this),e=o(t,!0);do{if(n=c(r,e))return n.set}while(r=u(r))}})},function(t,n,r){var e=r(1),i=r(176)(!1);e(e.S,"Object",{values:function(t){return i(t)}})},function(t,n,r){"use strict";var e=r(1),i=r(3),o=r(52),u=r(143)(),c=r(7)("observable"),f=r(26),a=r(2),s=r(68),l=r(73),h=r(27),v=r(79),p=v.RETURN,d=function(t){return null==t?void 0:f(t)},y=function(t){var n=t._c;n&&(t._c=void 0,n())},g=function(t){return void 0===t._o},b=function(t){g(t)||(t._o=void 0,y(t))},m=function(t,n){a(t),this._c=void 0,this._o=t,t=new x(this);try{var r=n(t),e=r;null!=r&&("function"==typeof r.unsubscribe?r=function(){e.unsubscribe()}:f(r),this._c=r)}catch(n){return void t.error(n)}g(this)&&y(this)};m.prototype=l({},{unsubscribe:function(){b(this)}});var x=function(t){this._s=t};x.prototype=l({},{next:function(t){var n=this._s;if(!g(n)){var r=n._o;try{var e=d(r.next);if(e)return e.call(r,t)}catch(t){try{b(n)}finally{throw t}}}},error:function(t){var n=this._s;if(g(n))throw t;var r=n._o;n._o=void 0;try{var e=d(r.error);if(!e)throw t;t=e.call(r,t)}catch(t){try{y(n)}finally{throw t}}return y(n),t},complete:function(t){var n=this._s;if(!g(n)){var r=n._o;n._o=void 0;try{var e=d(r.complete);t=e?e.call(r,t):void 0}catch(t){try{y(n)}finally{throw t}}return y(n),t}}});var w=function(t){s(this,w,"Observable","_f")._f=f(t)};l(w.prototype,{subscribe:function(t){return new m(t,this._f)},forEach:function(t){var n=this;return new(o.Promise||i.Promise)(function(r,e){f(t);var i=n.subscribe({next:function(n){try{return t(n)}catch(t){e(t),i.unsubscribe()}},error:e,complete:r})})}}),l(w,{from:function(t){var n="function"==typeof this?this:w,r=d(a(t)[c]);if(r){var e=a(r.call(t));return e.constructor===n?e:new n(function(t){return e.subscribe(t)})}return new n(function(n){var r=!1;return u(function(){if(!r){try{if(v(t,!1,function(t){if(n.next(t),r)return p})===p)return}catch(t){if(r)throw t;return void n.error(t)}n.complete()}}),function(){r=!0}})},of:function(){for(var t=0,n=arguments.length,r=Array(n);t<n;)r[t]=arguments[t++];return new("function"==typeof this?this:w)(function(t){var n=!1;return u(function(){if(!n){for(var e=0;e<r.length;++e)if(t.next(r[e]),n)return;t.complete()}}),function(){n=!0}})}}),h(w.prototype,c,function(){return this}),e(e.G,{Observable:w}),r(74)("Observable")},function(t,n,r){var e=r(54),i=r(2),o=e.key,u=e.set;e.exp({defineMetadata:function(t,n,r,e){u(t,n,i(r),o(e))}})},function(t,n,r){var e=r(54),i=r(2),o=e.key,u=e.map,c=e.store;e.exp({deleteMetadata:function(t,n){var r=arguments.length<3?void 0:o(arguments[2]),e=u(i(n),r,!1);if(void 0===e||!e.delete(t))return!1;if(e.size)return!0;var f=c.get(n);return f.delete(r),!!f.size||c.delete(n)}})},function(t,n,r){var e=r(185),i=r(161),o=r(54),u=r(2),c=r(32),f=o.keys,a=o.key,s=function(t,n){var r=f(t,n),o=c(t);if(null===o)return r;var u=s(o,n);return u.length?r.length?i(new e(r.concat(u))):u:r};o.exp({getMetadataKeys:function(t){return s(u(t),arguments.length<2?void 0:a(arguments[1]))}})},function(t,n,r){var e=r(54),i=r(2),o=r(32),u=e.has,c=e.get,f=e.key,a=function(t,n,r){if(u(t,n,r))return c(t,n,r);var e=o(n);return null!==e?a(t,e,r):void 0};e.exp({getMetadata:function(t,n){return a(t,i(n),arguments.length<3?void 0:f(arguments[2]))}})},function(t,n,r){var e=r(54),i=r(2),o=e.keys,u=e.key;e.exp({getOwnMetadataKeys:function(t){
return o(i(t),arguments.length<2?void 0:u(arguments[1]))}})},function(t,n,r){var e=r(54),i=r(2),o=e.get,u=e.key;e.exp({getOwnMetadata:function(t,n){return o(t,i(n),arguments.length<3?void 0:u(arguments[2]))}})},function(t,n,r){var e=r(54),i=r(2),o=r(32),u=e.has,c=e.key,f=function(t,n,r){if(u(t,n,r))return!0;var e=o(n);return null!==e&&f(t,e,r)};e.exp({hasMetadata:function(t,n){return f(t,i(n),arguments.length<3?void 0:c(arguments[2]))}})},function(t,n,r){var e=r(54),i=r(2),o=e.has,u=e.key;e.exp({hasOwnMetadata:function(t,n){return o(t,i(n),arguments.length<3?void 0:u(arguments[2]))}})},function(t,n,r){var e=r(54),i=r(2),o=r(26),u=e.key,c=e.set;e.exp({metadata:function(t,n){return function(r,e){c(t,n,(void 0!==e?i:o)(r),u(e))}}})},function(t,n,r){var e=r(1);e(e.P+e.R,"Set",{toJSON:r(165)("Set")})},function(t,n,r){"use strict";var e=r(1),i=r(147)(!0);e(e.P,"String",{at:function(t){return i(this,t)}})},function(t,n,r){"use strict";var e=r(1),i=r(46),o=r(16),u=r(122),c=r(120),f=RegExp.prototype,a=function(t,n){this._r=t,this._s=n};r(139)(a,"RegExp String",function(){var t=this._r.exec(this._s);return{value:t,done:null===t}}),e(e.P,"String",{matchAll:function(t){if(i(this),!u(t))throw TypeError(t+" is not a regexp!");var n=String(this),r="flags"in f?String(t.flags):c.call(t),e=new RegExp(t.source,~r.indexOf("g")?r:"g"+r);return e.lastIndex=o(t.lastIndex),new a(e,n)}})},function(t,n,r){"use strict";var e=r(1),i=r(181);e(e.P,"String",{padEnd:function(t){return i(this,t,arguments.length>1?arguments[1]:void 0,!1)}})},function(t,n,r){"use strict";var e=r(1),i=r(181);e(e.P,"String",{padStart:function(t){return i(this,t,arguments.length>1?arguments[1]:void 0,!0)}})},function(t,n,r){"use strict";r(82)("trimLeft",function(t){return function(){return t(this,1)}},"trimStart")},function(t,n,r){"use strict";r(82)("trimRight",function(t){return function(){return t(this,2)}},"trimEnd")},function(t,n,r){r(153)("asyncIterator")},function(t,n,r){r(153)("observable")},function(t,n,r){var e=r(1);e(e.S,"System",{global:r(3)})},function(t,n,r){for(var e=r(155),i=r(28),o=r(3),u=r(27),c=r(80),f=r(7),a=f("iterator"),s=f("toStringTag"),l=c.Array,h=["NodeList","DOMTokenList","MediaList","StyleSheetList","CSSRuleList"],v=0;v<5;v++){var p,d=h[v],y=o[d],g=y&&y.prototype;if(g){g[a]||u(g,a,l),g[s]||u(g,s,d),c[d]=l;for(p in e)g[p]||i(g,p,e[p],!0)}}},function(t,n,r){var e=r(1),i=r(151);e(e.G+e.B,{setImmediate:i.set,clearImmediate:i.clear})},function(t,n,r){var e=r(3),i=r(1),o=r(121),u=r(207),c=e.navigator,f=!!c&&/MSIE .\./.test(c.userAgent),a=function(t){return f?function(n,r){return t(o(u,[].slice.call(arguments,2),"function"==typeof n?n:Function(n)),r)}:t};i(i.G+i.B+i.F*f,{setTimeout:a(e.setTimeout),setInterval:a(e.setInterval)})},function(t,n,r){r(330),r(269),r(271),r(270),r(273),r(275),r(280),r(274),r(272),r(282),r(281),r(277),r(278),r(276),r(268),r(279),r(283),r(284),r(236),r(238),r(237),r(286),r(285),r(256),r(266),r(267),r(257),r(258),r(259),r(260),r(261),r(262),r(263),r(264),r(265),r(239),r(240),r(241),r(242),r(243),r(244),r(245),r(246),r(247),r(248),r(249),r(250),r(251),r(252),r(253),r(254),r(255),r(317),r(322),r(329),r(320),r(312),r(313),r(318),r(323),r(325),r(308),r(309),r(310),r(311),r(314),r(315),r(316),r(319),r(321),r(324),r(326),r(327),r(328),r(231),r(233),r(232),r(235),r(234),r(220),r(218),r(224),r(221),r(227),r(229),r(217),r(223),r(214),r(228),r(212),r(226),r(225),r(219),r(222),r(211),r(213),r(216),r(215),r(230),r(155),r(302),r(307),r(184),r(303),r(304),r(305),r(306),r(287),r(183),r(185),r(186),r(342),r(331),r(332),r(337),r(340),r(341),r(335),r(338),r(336),r(339),r(333),r(334),r(288),r(289),r(290),r(291),r(292),r(295),r(293),r(294),r(296),r(297),r(298),r(299),r(301),r(300),r(343),r(369),r(372),r(371),r(373),r(374),r(370),r(375),r(376),r(354),r(357),r(353),r(351),r(352),r(355),r(356),r(346),r(368),r(377),r(345),r(347),r(349),r(348),r(350),r(359),r(360),r(362),r(361),r(364),r(363),r(365),r(366),r(367),r(344),r(358),r(380),r(379),r(378),t.exports=r(52)},function(t,n){function r(t,n){if("string"==typeof n)return t.insertAdjacentHTML("afterend",n);var r=t.nextSibling;return r?t.parentNode.insertBefore(n,r):t.parentNode.appendChild(n)}t.exports=r},,,,,,,,,function(t,n,r){(function(n,r){!function(n){"use strict";function e(t,n,r,e){var i=n&&n.prototype instanceof o?n:o,u=Object.create(i.prototype),c=new p(e||[]);return u._invoke=s(t,r,c),u}function i(t,n,r){try{return{type:"normal",arg:t.call(n,r)}}catch(t){return{type:"throw",arg:t}}}function o(){}function u(){}function c(){}function f(t){["next","throw","return"].forEach(function(n){t[n]=function(t){return this._invoke(n,t)}})}function a(t){function n(r,e,o,u){var c=i(t[r],t,e);if("throw"!==c.type){var f=c.arg,a=f.value;return a&&"object"==typeof a&&m.call(a,"__await")?Promise.resolve(a.__await).then(function(t){n("next",t,o,u)},function(t){n("throw",t,o,u)}):Promise.resolve(a).then(function(t){f.value=t,o(f)},u)}u(c.arg)}function e(t,r){function e(){return new Promise(function(e,i){n(t,r,e,i)})}return o=o?o.then(e,e):e()}"object"==typeof r&&r.domain&&(n=r.domain.bind(n));var o;this._invoke=e}function s(t,n,r){var e=P;return function(o,u){if(e===F)throw new Error("Generator is already running");if(e===M){if("throw"===o)throw u;return y()}for(r.method=o,r.arg=u;;){var c=r.delegate;if(c){var f=l(c,r);if(f){if(f===A)continue;return f}}if("next"===r.method)r.sent=r._sent=r.arg;else if("throw"===r.method){if(e===P)throw e=M,r.arg;r.dispatchException(r.arg)}else"return"===r.method&&r.abrupt("return",r.arg);e=F;var a=i(t,n,r);if("normal"===a.type){if(e=r.done?M:j,a.arg===A)continue;return{value:a.arg,done:r.done}}"throw"===a.type&&(e=M,r.method="throw",r.arg=a.arg)}}}function l(t,n){var r=t.iterator[n.method];if(r===g){if(n.delegate=null,"throw"===n.method){if(t.iterator.return&&(n.method="return",n.arg=g,l(t,n),"throw"===n.method))return A;n.method="throw",n.arg=new TypeError("The iterator does not provide a 'throw' method")}return A}var e=i(r,t.iterator,n.arg);if("throw"===e.type)return n.method="throw",n.arg=e.arg,n.delegate=null,A;var o=e.arg;return o?o.done?(n[t.resultName]=o.value,n.next=t.nextLoc,"return"!==n.method&&(n.method="next",n.arg=g),n.delegate=null,A):o:(n.method="throw",n.arg=new TypeError("iterator result is not an object"),n.delegate=null,A)}function h(t){var n={tryLoc:t[0]};1 in t&&(n.catchLoc=t[1]),2 in t&&(n.finallyLoc=t[2],n.afterLoc=t[3]),this.tryEntries.push(n)}function v(t){var n=t.completion||{};n.type="normal",delete n.arg,t.completion=n}function p(t){this.tryEntries=[{tryLoc:"root"}],t.forEach(h,this),this.reset(!0)}function d(t){if(t){var n=t[w];if(n)return n.call(t);if("function"==typeof t.next)return t;if(!isNaN(t.length)){var r=-1,e=function n(){for(;++r<t.length;)if(m.call(t,r))return n.value=t[r],n.done=!1,n;return n.value=g,n.done=!0,n};return e.next=e}}return{next:y}}function y(){return{value:g,done:!0}}var g,b=Object.prototype,m=b.hasOwnProperty,x="function"==typeof Symbol?Symbol:{},w=x.iterator||"@@iterator",S=x.asyncIterator||"@@asyncIterator",_=x.toStringTag||"@@toStringTag",O="object"==typeof t,E=n.regeneratorRuntime;if(E)return void(O&&(t.exports=E));E=n.regeneratorRuntime=O?t.exports:{},E.wrap=e;var P="suspendedStart",j="suspendedYield",F="executing",M="completed",A={},N={};N[w]=function(){return this};var T=Object.getPrototypeOf,I=T&&T(T(d([])));I&&I!==b&&m.call(I,w)&&(N=I);var k=c.prototype=o.prototype=Object.create(N);u.prototype=k.constructor=c,c.constructor=u,c[_]=u.displayName="GeneratorFunction",E.isGeneratorFunction=function(t){var n="function"==typeof t&&t.constructor;return!!n&&(n===u||"GeneratorFunction"===(n.displayName||n.name))},E.mark=function(t){return Object.setPrototypeOf?Object.setPrototypeOf(t,c):(t.__proto__=c,_ in t||(t[_]="GeneratorFunction")),t.prototype=Object.create(k),t},E.awrap=function(t){return{__await:t}},f(a.prototype),a.prototype[S]=function(){return this},E.AsyncIterator=a,E.async=function(t,n,r,i){var o=new a(e(t,n,r,i));return E.isGeneratorFunction(n)?o:o.next().then(function(t){return t.done?t.value:o.next()})},f(k),k[_]="Generator",k.toString=function(){return"[object Generator]"},E.keys=function(t){var n=[];for(var r in t)n.push(r);return n.reverse(),function r(){for(;n.length;){var e=n.pop();if(e in t)return r.value=e,r.done=!1,r}return r.done=!0,r}},E.values=d,p.prototype={constructor:p,reset:function(t){if(this.prev=0,this.next=0,this.sent=this._sent=g,this.done=!1,this.delegate=null,this.method="next",this.arg=g,this.tryEntries.forEach(v),!t)for(var n in this)"t"===n.charAt(0)&&m.call(this,n)&&!isNaN(+n.slice(1))&&(this[n]=g)},stop:function(){this.done=!0;var t=this.tryEntries[0],n=t.completion;if("throw"===n.type)throw n.arg;return this.rval},dispatchException:function(t){function n(n,e){return o.type="throw",o.arg=t,r.next=n,e&&(r.method="next",r.arg=g),!!e}if(this.done)throw t;for(var r=this,e=this.tryEntries.length-1;e>=0;--e){var i=this.tryEntries[e],o=i.completion;if("root"===i.tryLoc)return n("end");if(i.tryLoc<=this.prev){var u=m.call(i,"catchLoc"),c=m.call(i,"finallyLoc");if(u&&c){if(this.prev<i.catchLoc)return n(i.catchLoc,!0);if(this.prev<i.finallyLoc)return n(i.finallyLoc)}else if(u){if(this.prev<i.catchLoc)return n(i.catchLoc,!0)}else{if(!c)throw new Error("try statement without catch or finally");if(this.prev<i.finallyLoc)return n(i.finallyLoc)}}}},abrupt:function(t,n){for(var r=this.tryEntries.length-1;r>=0;--r){var e=this.tryEntries[r];if(e.tryLoc<=this.prev&&m.call(e,"finallyLoc")&&this.prev<e.finallyLoc){var i=e;break}}i&&("break"===t||"continue"===t)&&i.tryLoc<=n&&n<=i.finallyLoc&&(i=null);var o=i?i.completion:{};return o.type=t,o.arg=n,i?(this.method="next",this.next=i.finallyLoc,A):this.complete(o)},complete:function(t,n){if("throw"===t.type)throw t.arg;return"break"===t.type||"continue"===t.type?this.next=t.arg:"return"===t.type?(this.rval=this.arg=t.arg,this.method="return",this.next="end"):"normal"===t.type&&n&&(this.next=n),A},finish:function(t){for(var n=this.tryEntries.length-1;n>=0;--n){var r=this.tryEntries[n];if(r.finallyLoc===t)return this.complete(r.completion,r.afterLoc),v(r),A}},catch:function(t){for(var n=this.tryEntries.length-1;n>=0;--n){var r=this.tryEntries[n];if(r.tryLoc===t){var e=r.completion;if("throw"===e.type){var i=e.arg;v(r)}return i}}throw new Error("illegal catch attempt")},delegateYield:function(t,n,r){return this.delegate={iterator:d(t),resultName:n,nextLoc:r},"next"===this.method&&(this.arg=g),A}}}("object"==typeof n?n:"object"==typeof window?window:"object"==typeof self?self:this)}).call(n,function(){return this}(),r(158))}])</script><script src="/./main.0cf68a.js"></script><script>!function(){!function(e){var t=document.createElement("script");document.getElementsByTagName("body")[0].appendChild(t),t.setAttribute("src",e)}("/slider.e37972.js")}()</script>


    
<div class="tools-col" q-class="show:isShow,hide:isShow|isFalse" q-on="click:stop(e)">
  <div class="tools-nav header-menu">
    
    
      
      
      
    
      
      
      
    
      
      
      
    
    

    <ul style="width: 70%">
    
    
      
      <li style="width: 33.333333333333336%" q-on="click: openSlider(e, 'innerArchive')"><a href="javascript:void(0)" q-class="active:innerArchive">所有文章</a></li>
      
        
      
      <li style="width: 33.333333333333336%" q-on="click: openSlider(e, 'friends')"><a href="javascript:void(0)" q-class="active:friends">友链</a></li>
      
        
      
      <li style="width: 33.333333333333336%" q-on="click: openSlider(e, 'aboutme')"><a href="javascript:void(0)" q-class="active:aboutme">关于我</a></li>
      
        
    </ul>
  </div>
  <div class="tools-wrap">
    
    	<section class="tools-section tools-section-all" q-show="innerArchive">
        <div class="search-wrap">
          <input class="search-ipt" q-model="search" type="text" placeholder="find something…">
          <i class="icon-search icon" q-show="search|isEmptyStr"></i>
          <i class="icon-close icon" q-show="search|isNotEmptyStr" q-on="click:clearChose(e)"></i>
        </div>
        <div class="widget tagcloud search-tag">
          <p class="search-tag-wording">tag:</p>
          <label class="search-switch">
            <input type="checkbox" q-on="click:toggleTag(e)" q-attr="checked:showTags">
          </label>
          <ul class="article-tag-list" q-show="showTags">
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color4">CSS</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color1">Array</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color4">ES6</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color4">Egg</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color2">HTML 5</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color1">Element UI</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color1">JavaScript</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color2">String</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color5">JavaScript设计模式</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color3">react-native</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color1">Redux</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color3">随笔</a>
              </li>
             
              <li class="article-tag-list-item">
                <a href="javascript:void(0)" class="js-tag color4">Vue</a>
              </li>
            
            <div class="clearfix"></div>
          </ul>
        </div>
        <ul class="search-ul">
          <p q-show="jsonFail" style="padding: 20px; font-size: 12px;">
            缺失模块。<br/>1、请确保node版本大于6.2<br/>2、在博客根目录（注意不是yilia根目录）执行以下命令：<br/> npm i hexo-generator-json-content --save<br/><br/>
            3、在根目录_config.yml里添加配置：
<pre style="font-size: 12px;" q-show="jsonFail">
  jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true
</pre>
          </p>
          <li class="search-li" q-repeat="items" q-show="isShow">
            <a q-attr="href:path|urlformat" class="search-title"><i class="icon-quo-left icon"></i><span q-text="title"></span></a>
            <p class="search-time">
              <i class="icon-calendar icon"></i>
              <span q-text="date|dateformat"></span>
            </p>
            <p class="search-tag">
              <i class="icon-price-tags icon"></i>
              <span q-repeat="tags" q-on="click:choseTag(e, name)" q-text="name|tagformat"></span>
            </p>
          </li>
        </ul>
    	</section>
    

    
    	<section class="tools-section tools-section-friends" q-show="friends">
  		
        <ul class="search-ul">
          
            <li class="search-li">
              <a href="http://www.baidu.com/" target="_blank" class="search-title"><i class="icon-quo-left icon"></i>百度一下</a>
            </li>
          
            <li class="search-li">
              <a href="https://translate.google.cn/" target="_blank" class="search-title"><i class="icon-quo-left icon"></i>谷歌翻译</a>
            </li>
          
            <li class="search-li">
              <a href="https://cn.vuejs.org/" target="_blank" class="search-title"><i class="icon-quo-left icon"></i>Vue学习</a>
            </li>
          
            <li class="search-li">
              <a href="http://element.eleme.io/" target="_blank" class="search-title"><i class="icon-quo-left icon"></i>Element UI</a>
            </li>
          
        </ul>
  		
    	</section>
    

    
    	<section class="tools-section tools-section-me" q-show="aboutme">
  	  	
  	  		<div class="aboutme-wrap" id="js-aboutme">乐观、自信、具有责任心&lt;br&gt;很强的求知欲&lt;br&gt;良好的自学能力&lt;br&gt;注重效率、勇于挑战&lt;br&gt;热爱互联网、热爱前端&lt;br&gt;自学过iOS，从事过移动Web开发</div>
  	  	
    	</section>
    
  </div>
  
</div>
    <!-- Root element of PhotoSwipe. Must have class pswp. -->
<div class="pswp" tabindex="-1" role="dialog" aria-hidden="true">

    <!-- Background of PhotoSwipe. 
         It's a separate element as animating opacity is faster than rgba(). -->
    <div class="pswp__bg"></div>

    <!-- Slides wrapper with overflow:hidden. -->
    <div class="pswp__scroll-wrap">

        <!-- Container that holds slides. 
            PhotoSwipe keeps only 3 of them in the DOM to save memory.
            Don't modify these 3 pswp__item elements, data is added later on. -->
        <div class="pswp__container">
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
            <div class="pswp__item"></div>
        </div>

        <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
        <div class="pswp__ui pswp__ui--hidden">

            <div class="pswp__top-bar">

                <!--  Controls are self-explanatory. Order can be changed. -->

                <div class="pswp__counter"></div>

                <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>

                <button class="pswp__button pswp__button--share" style="display:none" title="Share"></button>

                <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>

                <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>

                <!-- Preloader demo http://codepen.io/dimsemenov/pen/yyBWoR -->
                <!-- element will get class pswp__preloader--active when preloader is running -->
                <div class="pswp__preloader">
                    <div class="pswp__preloader__icn">
                      <div class="pswp__preloader__cut">
                        <div class="pswp__preloader__donut"></div>
                      </div>
                    </div>
                </div>
            </div>

            <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
                <div class="pswp__share-tooltip"></div> 
            </div>

            <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
            </button>

            <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
            </button>

            <div class="pswp__caption">
                <div class="pswp__caption__center"></div>
            </div>

        </div>

    </div>

</div>
  </div>
</body>
</html>